Unified CM release trains and lifecycle dates

See also

Sources

1. 1
   Build numbers for that release are 15.0.1.14901-2 for Unified Communications Manager 15SU4a and 15.0.1.14900-8 for IM and Presence Service 15SU4.

   Release Notes for Cisco Unified Communications Manager Release 15SU4a and the IM and Presence Service Release 15SU4 · Version numbers line · Checked 2026-09-04
2. 2
   The most recent Cisco Unified Communications Manager release documented at the time of research is Release 15SU4a, paired with IM and Presence Service Release 15SU4.

   Release Notes for Cisco Unified Communications Manager Release 15SU4a and the IM and Presence Service Release 15SU4 · Document title · Checked 2026-09-04
3. 3
   The Cisco end-of-life notice index page for Unified Communications Manager did not list the Version 14 perpetual bulletin, so that index cannot be treated as an exhaustive record of lifecycle notices.inferred

   Cisco Unified Communications Manager (CallManager) — End-of-Life and End-of-Sale Notices · Bulletin link list observed on 2026-09-04 · Checked 2026-09-04
4. 4
   The end-of-sale date for Version 14 perpetual on-premises calling applications was 7 April 2025.

   End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · Milestone table, End-of-Sale Date · Checked 2026-09-04
5. 5
   The end of software maintenance releases for Version 14 perpetual on-premises calling applications was 7 April 2026, meaning Cisco may no longer issue maintenance or bug-fix builds for that release.

   End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · Milestone table, End of SW Maintenance Releases Date · Checked 2026-09-04
6. 6
   The end-of-life announcement for Cisco Version 14 on-premises calling applications under perpetual licensing, including Unified Communications Manager, was distributed on 7 October 2024.

   End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · Milestone table, End-of-Life Announcement Date · Checked 2026-09-04
7. 7
   The last date of support for Version 14 perpetual on-premises calling applications is 30 April 2027, after which Cisco states all support services are unavailable and the product is obsolete.

   End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · Milestone table, Last Date of Support · Checked 2026-09-04
8. 8
   The last ship date for Version 14 perpetual on-premises calling application SKUs was 6 July 2025.

   End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · Milestone table, Last Ship Date · Checked 2026-09-04
9. 9
   Upgrading from 14SU4 to any Release 15 destination below 15SU2 is not offered (CSCwi85184).

   Compatibility Matrix for Cisco Unified Communications Manager and the IM and Presence Service, Release 15x · Supported Upgrade and Migration Paths, source 14 and SUs, Direct Standard Upgrade rows · Checked 2026-10-14
10. 10
    From 15SU3 onward, Unified CM virtual machines need a CPU with AVX support. VMware EVC baselines older than AVX, such as Westmere, cause installs, direct upgrades and direct migrations to fail.

    ReadMe for Cisco Unified Communications Manager Release 15SU4a · Important Notes, CPU / AVX requirement · Checked 2026-10-14
11. 11
    The 15SU4a ISO is UCSInstall_UCOS_15.0.1.14901-2 (restricted and unrestricted variants). Fresh installs can start from base 15.0.1.10000-32 and then apply 15.0.1.14901-2.

    ReadMe for Cisco Unified Communications Manager Release 15SU4a · Installation / version information section of the ReadMe · Checked 2026-10-14
12. 12
    The 15SU4a ReadMe says the SU installs only on 12.5(1), 14, 15 through 15SU3/SU3a, or 15 ES builds 15.0.1.11001-3 to 15.0.1.14026-1. Earlier versions need a PCD migration.

    ReadMe for Cisco Unified Communications Manager Release 15SU4a · Important Notes / installation prerequisites, supported source versions · Checked 2026-10-14
13. 13
    The Unified CM 15SU5 build is 15.0.1.15900-150.

    Release Notes for Cisco Unified Communications Manager and the IM and Presence Service, Release 15SU5 · About this release / version information section · Checked 2026-10-14
14. 14
    Starting with 15SU5, device firmware is no longer bundled with the Unified CM software.

    Release Notes for Cisco Unified Communications Manager and the IM and Presence Service, Release 15SU5 · Important Notes, device firmware unbundling note · Checked 2026-10-14
15. 15
    15SU5 adds hypervisor support for VMware ESX 9.0 and 9.1 and Nutanix AHV 11.0 (with AOS 7.5) for on-premises calling applications.

    Release Notes for Cisco Unified Communications Manager and the IM and Presence Service, Release 15SU5 · New and Changed Features, Expanded Hypervisor Support for On-premises Calling Applications · Checked 2026-10-14
16. 16
    The IM and Presence Service 15SU5 build is 15.0.1.15900-42.

    Release Notes for Cisco Unified Communications Manager and the IM and Presence Service, Release 15SU5 · About this release / version information section · Checked 2026-10-14
17. 17
    Remote Call Control with Microsoft Lync Server is not supported on IM and Presence Release 15. It remains supported on 12.5.x and 14 and their SUs until their EOL/EOS.

    Release Notes for Cisco Unified Communications Manager and the IM and Presence Service, Release 15SU5 · Important Notes / Deprecated features, Remote Call Control with Microsoft Lync Server · Checked 2026-10-14
18. 18
    Release notes for Unified CM and IM and Presence Release 15SU5 were published October 14, 2026.

    Release Notes for Cisco Unified Communications Manager and the IM and Presence Service, Release 15SU5 · Document header, Updated date · Checked 2026-10-14
19. 19
    The Release 15 Compatibility Matrix requires the CSCwi52160 direct-migration COP for every PCD 15 Migration Task and Fresh Install with Data Import path. Fresh Install with Data Import also needs the DataExport COP.

    Compatibility Matrix for Cisco Unified Communications Manager and the IM and Presence Service, Release 15x · Supported Upgrade and Migration Paths, Prerequisites column; COP file notes · Checked 2026-10-14
20. 20
    CSCwi52160 is an open caveat on all Release 15 versions: direct migration from pre-15 to 15 fails when the system has upgrade history from before 10.0.

    ReadMe for Cisco Unified Communications Manager Release 15SU4a · Open Caveats, CSCwi52160 · Checked 2026-10-14
21. 21
    CSCwv44220, added to the 15SU4a ReadMe on July 29, 2026, is an open caveat in which Release 15 install or upgrade hangs on servers with various AMD EPYC CPUs. It affects 15SU4 and 15SU4a.

    ReadMe for Cisco Unified Communications Manager Release 15SU4a · Revision History (July 29, 2026); Open Caveats, CSCwv44220 · Checked 2026-10-14
22. 22
    The Unified CM 12.5 and 14 Last Dates of Support fall about two years after their end-of-sale dates (Aug 31, 2023 to Aug 31, 2025; Apr 7, 2025 to Apr 30, 2027), matching Cisco's two-year TAC window for application software. Expect any future Release 15 LDOS to land about two years after its EoS.inferred

    Cisco End-of-Life Policy · Software support after End of Sale section; read with EOL14949 and EOL15245 milestone tables · Checked 2026-10-14
23. 23
    Direct refresh upgrades are not supported to Release 15 or later.

    Compatibility Matrix for Cisco Unified Communications Manager and the IM and Presence Service, Release 15x · Supported Upgrade and Migration Paths, notes below the table · Checked 2026-10-14
24. 24
    Cisco's End-of-Life Policy provides TAC support for application software for two years from the end-of-sale date. Subscription software gets support until the end of the term.

    Cisco End-of-Life Policy · Software support after End of Sale section · Checked 2026-10-14
25. 25
    For a PCD 15 Upgrade Task from 12.5, the sha512sum signing-key COP is needed if the Unified CM source is older than 12.5.1.14900-63 or the IM&P source is older than 12.5.1.14900-4.

    Compatibility Matrix for Cisco Unified Communications Manager and the IM and Presence Service, Release 15x · Supported Upgrade and Migration Paths, source 12.5 Direct Standard Upgrade via PCD 15 Upgrade Task row · Checked 2026-10-14
26. 26
    Unified CM 12.5 can upgrade to Release 15 with a Direct Standard Upgrade, through OS Admin or CLI or a PCD 15 Upgrade Task. Version switching is supported, and the pre-upgrade-check COP is a prerequisite.

    Compatibility Matrix for Cisco Unified Communications Manager and the IM and Presence Service, Release 15x · Supported Upgrade and Migration Paths, source 12.5 rows · Checked 2026-10-14
27. 27
    Unified CM 14 and its SUs can upgrade to Release 15 with a Direct Standard Upgrade, through OS Admin or CLI or a PCD Upgrade Task. Version switching is supported.

    Compatibility Matrix for Cisco Unified Communications Manager and the IM and Presence Service, Release 15x · Supported Upgrade and Migration Paths, source 14 and SUs rows · Checked 2026-10-14
28. 28
    When switching versions to Release 15, switch Unified CM nodes first (publisher, then subscribers) and IM&P nodes after them.

    Compatibility Matrix for Cisco Unified Communications Manager and the IM and Presence Service, Release 15x · Supported Upgrade and Migration Paths, sequencing note · Checked 2026-10-14
29. 29
    Sources older than 12.5 (10.0, 10.5, 11.0, 11.5 and 12.0) cannot direct-upgrade to Release 15. They must migrate with a PCD 15 Migration Task (V2V), or, except for 10.0, with Fresh Install with Data Import.

    Compatibility Matrix for Cisco Unified Communications Manager and the IM and Presence Service, Release 15x · Supported Upgrade and Migration Paths, source 10.0, 10.5, 11.0/11.5 and 12.0 rows · Checked 2026-10-14
30. 30
    The End-of-Sale Date for Unified CM 12.5 (EOL14949) is August 31, 2023.

    End-of-Sale and End-of-Life Announcement for the Cisco Version 12.5 of On-premises Calling applications (including Cisco Unified Communications Manager) and associated On-premises Flex subscriptions · Milestones table, End-of-Sale Date row · Checked 2026-10-14
31. 31
    The End of SW Maintenance Releases Date (Subscription) for Version 12.5 On-premises Calling applications is August 31, 2024.

    End-of-Sale and End-of-Life Announcement for the Cisco Version 12.5 of On-premises Calling applications (including Cisco Unified Communications Manager) and associated On-premises Flex subscriptions · Milestones table, End of SW Maintenance Releases Date (Subscription) row · Checked 2026-10-14
32. 32
    Cisco announced end-of-sale and end-of-life for Version 12.5 On-premises Calling applications, including Unified CM 12.5 and associated Flex subscriptions, in bulletin EOL14949 with an announcement date of March 1, 2023.

    End-of-Sale and End-of-Life Announcement for the Cisco Version 12.5 of On-premises Calling applications (including Cisco Unified Communications Manager) and associated On-premises Flex subscriptions · Milestones table, End-of-Life Announcement Date row · Checked 2026-10-14
33. 33
    The Last Date of Support for Version 12.5 On-premises Calling applications, including Unified CM 12.5, is August 31, 2025.

    End-of-Sale and End-of-Life Announcement for the Cisco Version 12.5 of On-premises Calling applications (including Cisco Unified Communications Manager) and associated On-premises Flex subscriptions · Milestones table, Last Date of Support (Subscription) row · Checked 2026-10-14
34. 34
    Cisco's Version 12.5 support page gives a release date of 22-JAN-2019 for Unified CM 12.5.

    Cisco Unified Communications Manager Version 12.5 - support page · Product overview panel, Release Date · Checked 2026-10-14
35. 35
    As of 2026-10-14, Cisco's Version 12.5 support page shows Unified CM 12.5 with status End of Support, no longer supported by Cisco.

    Cisco Unified Communications Manager Version 12.5 - support page · Product overview panel, Status · Checked 2026-10-14
36. 36
    The Unified CM 14SU6 build is 14.0.1.16900-4. The IM and Presence 14SU6 build is listed as 14.0.16900-3.

    Release Notes for Cisco Unified Communications Manager and the IM and Presence Service, Release 14SU6 · About this release / version information section · Checked 2026-10-14
37. 37
    14SU6 is probably the final service update for Release 14: it shipped before the April 7, 2026 End of SW Maintenance Releases date, and no later Release 14 SU appears on Cisco's listings as of 2026-10-14. Cisco does not say this directly.inferred

    Release Notes for Cisco Unified Communications Manager and the IM and Presence Service, Release 14SU6 · Document header, First Published; read with EOL15245 Table 1 and the v14 support page Release Notes list · Checked 2026-10-14
38. 38
    Release 14SU6 introduces no new features. Its New and Changed Features section lists none.

    Release Notes for Cisco Unified Communications Manager and the IM and Presence Service, Release 14SU6 · New and Changed Features · Checked 2026-10-14
39. 39
    Unified CM and IM and Presence Release 14SU6 release notes were first published March 18, 2026, three weeks before the Release 14 End of SW Maintenance Releases date.

    Release Notes for Cisco Unified Communications Manager and the IM and Presence Service, Release 14SU6 · Document header, First Published · Checked 2026-10-14
40. 40
    A separate bulletin, EOL15219, covers Version 14 On-premises Calling applications sold as On-premises Flex subscriptions. It was announced October 7, 2024 with End-of-Sale April 7, 2025.

    End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) and associated On-premises Flex subscriptions (EOL15219) · Overview; End-of-life milestones table, announcement and End-of-Sale rows · Checked 2026-10-14
41. 41
    Under EOL15219, existing Version 14 On-premises Flex subscriptions can be renewed or changed until April 7, 2027 (End of Change/Renewal and End of Service Contract Renewal, Subscription).

    End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) and associated On-premises Flex subscriptions (EOL15219) · End-of-life milestones table, End of Change/Renewal Date (Subscription) row · Checked 2026-10-14
42. 42
    EOL15219 names A-FLEX-SW-15-K9 (On-Premises SW Bundle v15) as the replacement for A-FLEX-SW-14-K9 (On-Premises SW Bundle v14).

    End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) and associated On-premises Flex subscriptions (EOL15219) · Product Part Numbers table, A-FLEX-SW-14-K9 row · Checked 2026-10-14
43. 43
    The EOL15245 milestone table, as extracted, prints October 7, 2024 for both End of New Service Attachment Date and End of Service Contract Renewal Date for Version 14 perpetual applications.

    End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · End-of-life milestones, Table 1, End of New Service Attachment Date and End of Service Contract Renewal Date rows · Checked 2026-10-14
44. 44
    EOL15245 lists the Unified CM IM and Presence Service (IM&P) 14 among the Version 14 applications it covers.

    End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · Overview, list of applicable Version 14 applications · Checked 2026-10-14
45. 45
    EOL15245 lists Session Management Edition (SME) 14 as one of the Version 14 applications it covers, so SME 14 shares the Unified CM 14 milestone dates.

    End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · Overview, list of applicable Version 14 applications · Checked 2026-10-14
46. 46
    The End-of-Sale Date for Unified CM 14 perpetual licensing (EOL15245) is April 7, 2025.

    End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · Overview; End-of-life milestones, Table 1, End-of-Sale Date row · Checked 2026-10-14
47. 47
    The End of SW Maintenance Releases Date for Unified CM 14 (EOL15245) is April 7, 2026, so as of 2026-10-14 Cisco is past the date for new Release 14 maintenance releases.

    End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · End-of-life milestones, Table 1, End of SW Maintenance Releases Date row · Checked 2026-10-14
48. 48
    Cisco announced end-of-sale and end-of-life for Version 14 of On-premises Calling applications with perpetual licensing, including Unified CM 14, in bulletin EOL15245 with an End-of-Life Announcement Date of October 7, 2024.

    End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · End-of-life milestones, Table 1, End-of-Life Announcement Date row · Checked 2026-10-14
49. 49
    The Last Ship Date for Unified CM 14 perpetual licensing (EOL15245) is July 6, 2025.

    End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · End-of-life milestones, Table 1, Last Ship Date row · Checked 2026-10-14
50. 50
    The Last Date of Support for Unified CM 14 (EOL15245) is April 30, 2027.

    End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · End-of-life milestones, Table 1, Last Date of Support row · Checked 2026-10-14
51. 51
    Cisco's migration guidance for Version 14 on-premises calling is to move to the latest release of On-premises Calling or to Cloud Calling under Collaboration Flex Plan 3.0.

    End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · Product migration options · Checked 2026-10-14
52. 52
    EOL15245 names UC-15-SW-K9= as the replacement for the end-of-sale part UC-14-SW-K9= (Unified CM software version 14 for MCE only).

    End-of-Sale and End-of-Life Announcement for the Cisco Version 14 of On-premises Calling applications (including Cisco Unified Communications Manager) — Perpetual · Product Part Numbers, Table 2, UC-14-SW-K9= row · Checked 2026-10-14
53. 53
    Cisco's Version 14 support page gives a release date of 24-MAR-2021 for Unified CM 14.

    Cisco Unified Communications Manager Version 14 - support page · Product overview panel, Release Date · Checked 2026-10-14
54. 54
    As of 2026-10-14, the Version 14 support page shows Unified CM 14 as supported but no longer sold (Not Orderable), with End-of-Sale 07-APR-2025 and End-of-Support 30-APR-2027.

    Cisco Unified Communications Manager Version 14 - support page · Product overview panel, Status, End-of-Sale Date and End-of-Support Date · Checked 2026-10-14
55. 55
    As of 2026-10-14, the Version 15 support page lists no end-of-sale or end-of-life notice for Release 15. The newest listed EOS/EOL notice is the Version 14 perpetual bulletin (14-May-2025).

    Cisco Unified Communications Manager Version 15 · End-of-Life and End-of-Sale Notices panel · Checked 2026-10-14
56. 56
    Cisco's Version 15 support page gives a release date of 16-OCT-2023 for Unified CM 15.

    Cisco Unified Communications Manager Version 15 · Product overview panel, Release Date · Checked 2026-10-14
57. 57
    As of 2026-10-14, the Version 15 support page shows Unified CM 15 with status Available (orderable) and prints no end-of-support date.

    Cisco Unified Communications Manager Version 15 · Product overview panel, Status · Checked 2026-10-14
58. 58
    The Release 15 train on Cisco's release notes list runs 15, 15SU1a (IM&P 15SU1), 15SU2, 15SU3a (IM&P 15SU3), 15SU4a (IM&P 15SU4) and 15SU5.

    Cisco Unified Communications Manager (CallManager) - Release Notes · Version 15 group, release notes document titles · Checked 2026-10-14
59. 59
    Release 15 supports virtualized deployments only. Installing on bare-metal servers is not supported.

    Compatibility Matrix for Cisco Unified Communications Manager and the IM and Presence Service, Release 15x · Virtualization / server support section · Checked 2026-10-14

Documents

Cite this page

WarmTransfer. (2026, October 14). Unified CM release trains and lifecycle dates. WarmTransfer. https://warmtransfer.net/knowledge/cucm-versions-lifecycle

@misc{warmtransfer-cucm-versions-lifecycle,
  title  = {Unified CM release trains and lifecycle dates},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/cucm-versions-lifecycle},
  note   = {Verified 2026-10-14}
}