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CVE-2026-76490: Cisco Expressway Series Software Hardening Release: October 2026 - Out-of-bounds Write Vulnerabilities
- Severity: high (CVSS 8.6 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-21 · updated 2026-10-22
- Weakness: CWE-787
Description
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Expressway Series software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76490 are related to issues concerning out-of-bounds writes that are grouped under the Common Weakness Enumeration (CWE) Base CWE-787.
Affected products
- Cisco TelePresence Video Communication Server (VCS) Expressway: X8.11.2, X8.6, X8.11.3, X8.2.2, X8.8.3, X8.11.0 (+87)
In the news
References
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