AI analysis
CVE-2026-76499 tracks improper-neutralization issues (CWE-707) in Cisco Application Policy Infrastructure Controller (APIC), found during a Cisco internal security review and addressed in software hardening releases. Cisco scores the issue 9.8 (critical): it is reachable over the network with low attack complexity, requires no privileges and no user interaction, and has high impact on confidentiality, integrity, and availability. The supplied description does not name a specific request path or injection type beyond those improper-neutralization flaws. APIC manages Cisco ACI data-center fabrics, so the affected population is enterprise and service-provider controller deployments rather than consumer devices. It is not in the CISA Known Exploited Vulnerabilities catalog and no public proof-of-concept is known.
What to do: Apply the Cisco APIC software hardening releases that address CVE-2026-76499, using the official Cisco PSIRT bulletin to identify the correct image for your software train, because fixed version numbers are not in the supplied data. Until those releases are installed, limit APIC management access to trusted administrative networks and hosts only. No public exploit is known, but the unauthenticated network CVSS vector means exposed management interfaces should be treated as high priority.
Affected
| Cisco Application Policy Infrastructure Controller (APIC) | — |
Estimated exposure
moderateon the order of thousands of APIC clusters (enterprise ACI deployments) — Cisco APIC is the controller for Cisco ACI data-center fabrics, typically a small cluster per fabric at large enterprises and service providers rather than a mass-market or widely internet-exposed product, and public install or scan counts…
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
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.