Source note · Web proxies and TLS inspection that break UC clients
CISA warns that an HTTPS inspection product may negotiate deprecated protocol versions or weak ciphers with the upstream server while the user sees a strongly encrypted connection to the proxy.
Checked 2026-10-14
- Vendor
- CISA
- Product
- not restricted
- Subsystem
- TLS interception risk
- Deployment
- any
- Region
- not restricted
- Release range
- advisory dated 2017-03-16
- Checked
- 2026-10-14
Sources
- HTTPS Interception Weakens TLS Security (TA17-075A) — CISA (US-CERT) · tier 1 standards and regulators · Description section
Cite this note
APA
WarmTransfer. (2026, October 14). Web proxies and TLS inspection that break UC clients: source note tls-inspection-uc-clients-cisa-weak-upstream-tls. WarmTransfer. https://warmtransfer.net/knowledge/claims/tls-inspection-uc-clients-cisa-weak-upstream-tls
BibTeX
@misc{warmtransfer-claim-tls-inspection-uc-clients-cisa-weak-upstream-tls,
title = {Web proxies and TLS inspection that break UC clients: source note tls-inspection-uc-clients-cisa-weak-upstream-tls},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/tls-inspection-uc-clients-cisa-weak-upstream-tls},
note = {Source note tls-inspection-uc-clients-cisa-weak-upstream-tls, checked 2026-10-14}
}