CVE-2025-20337

CRITICAL10.0

CISA KEV

Published 2025-07-16 · Updated 2026-06-17 · Source psirt@cisco.com

Summary

CVE-2025-20337 is a critical-severity (CVSS 10.0) vulnerability in Cisco Identity Services Engine. CISA added it to the Known Exploited Vulnerabilities catalog on July 28, 2025, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by August 18, 2025. CISA does not currently list it as used in ransomware campaigns. Cisco has 102 vulnerabilities in the KEV catalog, 7 of them linked to ransomware.

All 102 known-exploited Cisco vulnerabilities →

Description

A vulnerability in a specific API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to execute arbitrary code on the underlying operating system as root. The attacker does not require any valid credentials to exploit this vulnerability. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by submitting a crafted API request. A successful exploit could allow the attacker to obtain root privileges on an affected device.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CWE-74

CISA Known-Exploited Vulnerability

Product: Cisco — Identity Services Engine

Name: Cisco Identity Services Engine Injection Vulnerability

Date added: 2025-07-28 · Due: 2025-08-18

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

View on NVD

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