CVE-2026-76492: NULL Pointer Dereference in Cisco Cisco TelePresence Video Communication Server (VCS) Expressway
Description
CVE-2026-76492 is a high-severity vulnerability in Cisco TelePresence Video Communication Server (VCS) Expressway involving a NULL pointer dereference. This issue was identified during an internal security review by Cisco and relates to null pointer handling errors. The vulnerability can cause denial of service due to application crashes but does not impact confidentiality or integrity.
CVSS v3.1
Score 7.5high
Affected software
Cisco
Cisco TelePresence Video Communication Server (VCS) Expressway
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Cisco's internal security review uncovered multiple vulnerabilities including CVE-2026-76492, which involves NULL pointer dereference issues in Cisco TelePresence VCS Expressway software. These vulnerabilities fall under CWE-476 (NULL Pointer Dereference). The CVSS 3.1 base score is 7.5, reflecting a network attack vector with low complexity and no privileges or user interaction required. The impact is limited to availability, causing potential denial of service conditions.
Potential Impact
The vulnerability can cause denial of service (availability impact) by triggering a NULL pointer dereference, leading to application or service crashes. There is no impact on confidentiality or integrity according to the CVSS vector.
Mitigation Recommendations
No explicit patch or remediation information is provided in the available data. Patch status is not yet confirmed — check Cisco's official advisory for current remediation guidance. Since this is not a cloud service, remediation depends on vendor patch releases.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2026-08-19T12:02:03.640Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad8e8d64d27ba8daac3b6d0
Added to database: 10/21/2026, 16:31:18 UTC
Last enriched: 10/21/2026, 16:45:42 UTC
Last updated: 10/21/2026, 16:46:20 UTC
Views: 5
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