CVE-2026-76499: Improper Neutralization in Cisco Cisco Application Policy Infrastructure Controller (APIC)

Cisco's internal security review of the Application Policy Infrastructure Controller (APIC) uncovered multiple vulnerabilities related to improper neutralization, categorized under CWE-707. These issues could allow an attacker to bypass security controls or cause significant impact to the system. The vulnerability is tracked as CVE-2026-76499 and has a CVSS v3.1 score of 9.8, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. No detailed technical exploitation methods or affected versions are specified in the provided data.

The vulnerability has a critical severity with a CVSS score of 9.8, indicating that successful exploitation could lead to complete compromise of confidentiality, integrity, and availability of the affected Cisco APIC system. This could result in unauthorized access, data manipulation, and denial of service conditions. However, no known exploits in the wild have been reported at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Cisco has conducted an internal review and released software hardening updates addressing multiple vulnerabilities, but no explicit patch or version information is provided here. Users should monitor Cisco's official advisories for updates and apply any released patches promptly once available.