CVE-2026-76447
Cisco Identity Services Engine Certificate Reload Vulnerability
Description
A vulnerability in the Online Certificate Status Protocol (OCSP) responder of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to cause an administrative reload of the OCSP responder certificate and key material. This vulnerability is due to missing authentication on a function of the OCSP responder. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to cause the OCSP responder to reload certificate and key material on demand.
Weakness: CWE-306
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco ISE Passive Identity Connector | Identity / IAM / MFA | cna-assigner |
| Cisco | Cisco Identity Services Engine (ISE) Check your version | Identity / IAM / MFA | cna-assigner |
Vendor-reported products (2)
- Cisco · Cisco Identity Services Engine Software
- Cisco · Cisco ISE Passive Identity Connector
Vendor advisory
cisco-sa-ise-multiauth-bypass-sgD2HbL4
Cisco Identity Services Engine Authentication Bypass Vulnerabilities
Cisco’s rating: Medium (advisory CVSS 5.3) · Published Sep 16, 2026 · updated Sep 24, 2026 (revision 1.1)
Bug IDs: CSCwu73771 , CSCwu73786 , CSCwu73808 , CSCwu73832
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from