CVE-2015-4316: n/a vulnerability

CVE-2015-4316: The Mobile and Remote Access (MRA) endpoint-validation feature in Cisco TelePresence Video Communication Se...

The Mobile and Remote Access (MRA) endpoint-validation feature in Cisco TelePresence Video Communication Server (VCS) Expressway X8.5.2 improperly validates the phone line used for registration, which allows remote authenticated users to conduct impersonation attacks via a crafted registration, aka Bug ID CSCuv40396.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 06:11 UTC (UTC+00:00)

Security readout for executives and security teams

Cisco TelePresence VCS Expressway X8.5.2 had a flaw in Mobile and Remote Access endpoint validation. An authenticated remote user could register in a way that impersonates another phone line. The main concern is misuse of trusted communications identity, not unauthenticated takeover. Organizations are likely exposed only if they run Cisco TelePresence Video Communication Server Expressway X8.5.2 with MRA endpoint validation enabled. Handle during normal vulnerability remediation unless the affected service supports high-trust executive, incident, or customer communications. Escalate if exposed remote access remains on X8.5.2. Mitigation focus: Check Cisco advisory 40445 and Bug ID CSCuv40396 for fixed or recommended releases.; Inventory VCS Expressway deployments and confirm whether X8.5.2 is still present.; Review MRA registration controls and restrict access to trusted, necessary users..

Prepared: Jun 13, 2026, 22:03 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Aug 20, 2015, 10:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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