Cisco Identity Services Engine Authorization Bypass Vulnerability

published 2026-11-04 4 d ago modified 2026-11-06 2 d ago also EUVD-2026-116973

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 16%
public exploits: 0; none known

A vulnerability in the authorization mechanism of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an unauthenticated, remote attacker to obtain an endpoint identity certificate.

This vulnerability is due to improper authorization checks. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to bypass authorization to obtain an endpoint certificate.

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 4 d ago (2026-11-04)

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% 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:L/I:N/A:N

Affected products

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

Classification

Weakness

CWE-285 Improper Authorization

References

sec.cloudapps.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-cert-mE9BD5GO

Sources

CVE List CVE-2026-20241
NVD CVE-2026-20241

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Summary