CVE-2026-76499: Cisco Application Policy Infrastructure Controller Apic

Critical severity, CVSS 9.8. EPSS: 0.3% chance of exploitation in the next 30 days.

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Application Policy Infrastructure Controller (APIC) 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-2026-76499 are related to improper neutralization issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-707.  

Affected products

• Cisco Cisco Application Policy Infrastructure Controller Apic: version 5.2(1g) only; version 5.2(2e) only; version 5.2(2f) only; version 5.2(2g) only; version 5.2(2h) only; version 5.2(3f) only; …

Published 2026-10-07. Last modified 2026-10-08.