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CVE-2026-76447: Cisco Identity Services Engine Certificate Reload Vulnerability
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-16 · updated 2026-09-28
- Weakness: CWE-306
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.
Affected products
- Cisco Identity Services Engine: before 3.3.0; 3.3.0-patch1, 3.3.0-patch10, 3.3.0-patch11, 3.3.0-patch2, 3.3.0-patch3, 3.3.0-patch4 (+16) — fixed in 3.3.0
- Cisco Identity Services Engine Passive Identity Connector: before 3.3.0; 3.3.0-patch1, 3.3.0-patch10, 3.3.0-patch11, 3.3.0-patch2, 3.3.0-patch3, 3.3.0-patch4 (+12) — fixed in 3.3.0
How to fix
Upgrade to a fixed version: Cisco Identity Services Engine 3.3.0; Cisco Identity Services Engine Passive Identity Connector 3.3.0. Check the vendor advisory for mitigations.
In the news
References
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