Cisco Identity Services Engine Certificate Reload Vulnerability

published 2026-09-16 53 d ago modified 2026-09-28 42 d ago also EUVD-2026-81165

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits: 0; none known

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.

Patch / fix

fixed in 2

cisco identity_services_engine_passive_identity_connector 3.3.0
cisco identity_services_engine 3.3.0

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 53 d ago (2026-09-17)

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

Cisco Cisco Identity Services Engine Software
Cisco Cisco ISE Passive Identity Connector

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

sec.cloudapps.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multiauth-bypass-sgD2HbL4
vendor-advisory

Sources

CVE List CVE-2026-76447
NVD CVE-2026-76447

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary