CVE-2024-20439

Name: CVE-2024-20439
Creator: NVD / NIST
Published: 2024-09-04T17:15:13.21+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 92.01%

Last modified Jun 17, 2026

CVE-2024-20439 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A vulnerability in Cisco Smart Licensing Utility (CSLU) could allow an unauthenticated, remote attacker to log into an affected system by using a static administrative credential. This vulnerability is due to an undocumented static user credential for an administrative account. An attacker could exploit this vulnerability by using the static credentials to login to the affected system. CISA has confirmed active exploitation in the wild. EPSS estimates a 92.01% chance of exploitation in the next 30 days.

Description

A vulnerability in Cisco Smart Licensing Utility (CSLU) could allow an unauthenticated, remote attacker to log into an affected system by using a static administrative credential. This vulnerability is due to an undocumented static user credential for an administrative account. An attacker could exploit this vulnerability by using the static credentials to login to the affected system. A successful exploit could allow the attacker to login to the affected system with administrative rights over the CSLU application API.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

92.01%

99.8th 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 Apr 21, 2025.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Smart License Utility	>= 2.0.0, < 2.3.0

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cslu-7gHMzWmwVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-20439US Government Resource

Timeline

Published: Sep 4, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2024-20439?

How severe is CVE-2024-20439?

CVE-2024-20439 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 92.01% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2024-20439?

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-2024-20439?

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

Scan your code now

Source: NVD / NIST