CVE-2026-20282
Cisco Identity Services Engine Authenticated Write Vulnerability
Description
A vulnerability in Cisco ISE could allow an authenticated, remote attacker to obtain write access on the underlying operating system of an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to obtain write access to the underlying operating system. To exploit this vulnerability, the attacker must have valid administrative credentials. Note: For CVE-2026-20282, Cisco has assigned a Security Impact Rating (SIR) of High rather than Medium as the score indicates. The reason is that it is easy to get to root from the achieved privilege level.
Weakness: CWE-641
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Identity Services Engine (ISE) Check your version | Identity / IAM / MFA | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco Identity Services Engine Software
Vendor advisory
cisco-sa-ise-mult-vul-ymSsTLCc
Cisco Identity Services Engine Authenticated Remote Code Execution and API Vulnerabilities
Cisco’s rating: Critical (advisory CVSS 9.1) · Published Sep 16, 2026
Bug IDs: CSCwu31070 , CSCwu40000 , CSCwu66592
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from