Cisco Application Policy Infrastructure Controller Security Hardening Release: October 2026

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. These vulnerabilities were found during internal testing and are not known to be actively exploited. To assist customers in patching and streamline the disclosure process, Cisco has grouped these issues by their underlying vulnerability class — Common Weakness Enumeration (CWE) — and assigned a single Common Vulnerabilities and Exposures identifier (CVE ID) to each CWE grouping. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-apic-UOXWtfh Security Impact Rating: Critical CVE: CVE-2026-76498,CVE-2026-76499,CVE-2026-76500

What to do

Install the fixed versions listed in the official advisory. If you cannot update right away, apply the workarounds or mitigations it describes and limit access to the affected service.

Details

Vendor

Cisco

Product

Cisco APIC

CVE

CVE-2026-76498, CVE-2026-76499, CVE-2026-76500

Affected versions

Cisco Application Policy Infrastructure Controller (APIC) 5.2: 26 versions, from 5.2(1g) to 5.2(8i)
Cisco Application Policy Infrastructure Controller (APIC) 6.0: 22 versions, from 6.0(1g) to 6.0(9f)
Cisco Application Policy Infrastructure Controller (APIC) 5.3: 7 versions, from 5.3(1d) to 5.3(2f)
Cisco Application Policy Infrastructure Controller (APIC) 6.1: 7 versions, from 6.1(1f) to 6.1(5e)
Cisco Application Policy Infrastructure Controller (APIC) 6.2: 6.2(1f); 6.2(1g); 6.2(2e) (from the advisory and NVD; check the exact builds in the official advisory)

CVSS score

9.8

Actively exploited

Not known at this time

Source

Cisco PSIRT – original advisory

Published

October 7, 2026

The description and the recommended action are quoted from the public advisory (the action is our generic advice); severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.