CVE-2025-20337

Name: CVE-2025-20337
Creator: NVD / NIST
Published: 2025-07-16T17:15:30.573+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 10/10Actively ExploitedEPSS 65.10%

Last modified Jun 17, 2026

CVE-2025-20337 is a critical-severity vulnerability rated 10/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 65.10% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

10/10

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

EPSS Probability

65.10%

99.2th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Aug 18, 2025.

Weakness Enumeration

CWE-74

Affected Software

Vendor	Product	Versions
Cisco	Identity Services Engine	3.3.0
Cisco	Identity Services Engine	3.4.0
Cisco	Identity Services Engine Passive Identity Connector	3.3.0
Cisco	Identity Services Engine Passive Identity Connector	3.4.0

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-unauth-rce-ZAd2GnJ6Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20337US Government Resource

Timeline

Published: Jul 16, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-20337?

How severe is CVE-2025-20337?

CVE-2025-20337 has a CVSS score of 10/10 (CRITICAL severity). The EPSS model estimates a 65.10% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2025-20337?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-20337?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST