Answer in brief
CVE-2026-76499 records a Critical severity (CVSS 9.8) vulnerability in Cisco Application Policy Infrastructure Controller Hardening Release: October 2026 - Improper Neutralization Vulnerabilities. The current sources do not mark it as known exploited. The current feed maps Cisco/Cisco Application Policy Infrastructure Controller (APIC) (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Cisco/Cisco Application Policy Infrastructure Controller (APIC) (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Cisco/Cisco Application Policy Infrastructure Controller (APIC)generic | 5.2(1g) || 5.2(2e) || 5.2(2f) || 5.2(2g) || 5.2(2h) || 5.2(3f) || 5.2(3e) || 5.2(3g) || 5.2(4d) || 5.2(4e) || 5.2(5d) || 5.2(5c) || 6.0(1g) || 5.2(5e) || 5.2(4f) || 5.2(6e) || 6.0(1j) || 5.2(6g) || 5.2(7f) || 5.2(7g) || 6.0(2h) || 5.2(6h) || 5.2(4h) || 5.2(8d) || 6.0(2j) || 5.2(8e) || 6.0(3d) || 6.0(3e) || 5.2(8f) || 5.2(8g) || 5.3(1d) || 5.2(8h) || 6.0(4c) || 5.3(2a) || 5.2(8i) || 6.0(5h) || 5.3(2b) || 6.0(3g) || 6.0(5j) || 5.3(2c) || 6.0(6c) || 6.1(1f) || 6.0(7e) || 5.3(2d) || 6.0(8d) || 6.0(8e) || 6.1(2f) || 6.0(8f) || 5.3(2e) || 6.1(2g) || 5.3(2f) || 6.0(9c) || 6.1(3f) || 6.0(9d) || 6.0(6g) || 6.0(6h) || 6.0(8h) || 6.1(3g) || 6.1(4h) || 6.0(9e) || 6.1(5e) || 6.2(1f) || 6.2(1g) || 6.0(9f) || 6.2(2e) | Not reported |
Published upstream
Oct 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 7, 2026
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.
Quoted source text, attributed separately from HOL analysis.