CVE-2025-20124

Name: CVE-2025-20124
Creator: NVD / NIST
Published: 2025-02-05T17:15:22.457+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 16.28%

Last modified Jun 17, 2026

CVE-2025-20124 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. A vulnerability in an API of Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands as the root user on an affected device. This vulnerability is due to insecure deserialization of user-supplied Java byte streams by the affected software. An attacker could exploit this vulnerability by sending a crafted serialized Java object to an affected API. EPSS estimates a 16.28% chance of exploitation in the next 30 days.

Description

A vulnerability in an API of Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands as the root user on an affected device. This vulnerability is due to insecure deserialization of user-supplied Java byte streams by the affected software. An attacker could exploit this vulnerability by sending a crafted serialized Java object to an affected API. A successful exploit could allow the attacker to execute arbitrary commands on the device and elevate privileges. Note: To successfully exploit this vulnerability, the attacker must have valid read-only administrative credentials. In a single-node deployment, new devices will not be able to authenticate during the reload time.

Metrics

CVSS 3.1

7.2/10

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

EPSS Probability

16.28%

96.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Cisco	Identity Services Engine	< 3.1
Cisco	Identity Services Engine	3.1.0
Cisco	Identity Services Engine	3.2.0
Cisco	Identity Services Engine	3.3.0

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multivuls-FTW9AOXFVendor Advisory

Timeline

Published: Feb 5, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-20124?

How severe is CVE-2025-20124?

CVE-2025-20124 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 16.28% probability of exploitation in the next 30 days.

How do I fix CVE-2025-20124?

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-2025-20124?

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

Scan your code now

Source: NVD / NIST