Answer in brief
CVE-2026-76423 records a Critical severity (CVSS 10.0) vulnerability in Cisco ISE API Authentication Bypass Vulnerability. The current sources do not mark it as known exploited. The current feed maps Cisco/Cisco Identity Services Engine Software (generic), Cisco/Cisco ISE Passive Identity Connector (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 10.0. 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 Identity Services Engine Software (generic), Cisco/Cisco ISE Passive Identity Connector (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Cisco/Cisco Identity Services Engine Softwaregeneric | 3.1.0 || 3.1.0 p1 || 3.1.0 p3 || 3.1.0 p2 || 3.2.0 || 3.1.0 p4 || 3.1.0 p5 || 3.2.0 p1 || 3.1.0 p6 || 3.2.0 p2 || 3.1.0 p7 || 3.3.0 || 3.2.0 p3 || 3.2.0 p4 || 3.1.0 p8 || 3.2.0 p5 || 3.2.0 p6 || 3.1.0 p9 || 3.3 Patch 2 || 3.3 Patch 1 || 3.3 Patch 3 || 3.4.0 || 3.2.0 p7 || 3.3 Patch 4 || 3.4 Patch 1 || 3.1.0 p10 || 3.3 Patch 5 || 3.3 Patch 6 || 3.4 Patch 2 || 3.3 Patch 7 || 3.4 Patch 3 || 3.5.0 || 3.4 Patch 4 || 3.3 Patch 8 || 3.2 Patch 8 || 3.5 Patch 1 || 3.3 Patch 9 || 3.2 Patch 9 || 3.4 Patch 5 || 3.5 Patch 3 || 3.5 Patch 2 || 3.3 Patch 10 || 3.3 Patch 11 || 3.4 Patch 6 || 3.2 Patch 10 || 3.1.0 p72 || 3.1.0 p11 || 3.3 Patch 12 | Not reported |
| Cisco/Cisco ISE Passive Identity Connectorgeneric | 3.2.0 || 3.1.0 || 3.3.0 || 3.4.0 || 3.5.0 | Not reported |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
A vulnerability in the REST API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to gain administrative access to an affected device. This vulnerability is due to the REST API web service being exposed with insufficient authorization checks. An attacker could exploit this vulnerability by sending a crafted HTTP request to the exposed REST API port. A successful exploit could allow the attacker to read and modify ISE configuration and identity data with administrative privileges.
Quoted source text, attributed separately from HOL analysis.