Field Notice: FN74382 - Cisco Unified Contact Center Products: Impact on Secure Communication Due to Upcoming Changes to TLS certificates Issued by Public Certificate Authorities with Client Authentication EKU, Starting March 2027 - Workaround Provided

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/support/docs/field-notices/743/fn74382.html

Published

2026-05-13

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Cisco website terms; no-redistribution; short excerpts and locators only

Source notes citing this source

• Field Notice FN74382 lists Unified CVP and Virtualized Voice Browser 12.5(1), 12.6(1), 12.6(2) and 15.0(1) as affected by public CAs dropping the Client Authentication EKU from TLS certificates, which breaks mutual-TLS connections. in context
• As of its 13 May 2026 revision, FN74382 names 15.0(1)SU2, projected for Q4 2026, as the fixed release that separates client and server certificates. in context
• FN74382 ties the impact to the Chrome Root Program policy change that takes effect in March 2027 and phases out multi-purpose public roots in favour of TLS-server-only hierarchies. in context

Cite this source record

APA

WarmTransfer. (2026, May 13). Field Notice: FN74382 - Cisco Unified Contact Center Products: Impact on Secure Communication Due to Upcoming Changes to TLS certificates Issued by Public Certificate Authorities with Client Authentication EKU, Starting March 2027 - Workaround Provided. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-fn74382-cc-tls-client-eku

BibTeX

@misc{warmtransfer-cisco-fn74382-cc-tls-client-eku,
  title  = {Field Notice: FN74382 - Cisco Unified Contact Center Products: Impact on Secure Communication Due to Upcoming Changes to TLS certificates Issued by Public Certificate Authorities with Client Authentication EKU, Starting March 2027 - Workaround Provided},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-fn74382-cc-tls-client-eku},
  note   = {Cisco Systems, accessed 2026-09-24}
}