CVE-2026-20282

CVE CVE-2026-20282EUVD EUVD-2026-81140Published 2026-09-16T20:15:43.000ZLast changed 2026-09-22T20:29:45.000ZCVSS 4.9

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Cisco — Cisco Identity Services Engine Software 3.3 Patch 5; 3.2.0 p7; 3.2.0 p5; 3.5.0; 3.3 Patch 9; 3.1.0 p72; 3.2 Patch 9; 3.2.0 p1; 3.2 Patch 11; 3.4 Patch 5; 3.1.0 p5; 3.1.0 p12; 3.5 Patch 1; 3.1.0 p10; 3.1.0 p4; 3.2.0 p2; 3.1.0; 3.3 Patch 2; 3.2.0; 3.3 Patch 6; 3.5 Patch 3; 3.3 Patch 1; 3.3 Patch 4; 3.4 Patch 6; 3.4 Patch 2; 3.3.0; 3.1.0 p9; 3.2 Patch 8; 3.3 Patch 10; 3.1.0 p2; 3.1.0 p6; 3.4 Patch 3; 3.1.0 p11; 3.5 Patch 2; 3.4 Patch 1; 3.1.0 p1; 3.2 Patch 10; 3.2.0 p6; 3.3 Patch 11; 3.1.0 p8; 3.3 Patch 3; 3.3 Patch 7; 3.2.0 p4; 3.4.0; 3.1.0 p7; 3.1.0 p3; 3.2.0 p3; 3.3 Patch 8; 3.4 Patch 4

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Cisco — Identity Services Engine Software

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.