Vulnerability in Cisco Application Policy Infrastructure Controller (APIC)

[ Why it matters ]Priority signals

• Critical severity: CVSS 9.8

[ Description ]Official description

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.  

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• NCSC-NL9 Oct 2026NCSC-2026-0409

  Vulnerabilities fixed in Cisco APIC Translated from Dutch

  Probability/damage M/HCVE-2026-20321CVE-2026-76488CVE-2026-76498+2 more CVEs
• CERT-FR8 Oct 2026CERTFR-2026-AVI-1282

  Multiple vulnerabilities in Cisco products Translated from French

  Multiple vulnerabilities have been discovered in Cisco products. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service.

  CVE-2026-76471CVE-2026-76455CVE-2026-76482+27 more CVEs
• BSI CERT-Bund7 Oct 2026WID-SEC-2026-3818

  Cisco Application Policy Infrastructure Controller: Multiple vulnerabilities Translated from German

  CVE-2026-20321CVE-2026-76499CVE-2026-76488+2 more CVEs

[ References ]References

• sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardenin…