CVE-2024-20439

CRITICAL9.8

CISA KEV

Published 2024-09-04 · Updated 2026-06-17 · Source psirt@cisco.com

Summary

CVE-2024-20439 is a critical-severity (CVSS 9.8) vulnerability in Cisco Smart Licensing Utility. CISA added it to the Known Exploited Vulnerabilities catalog on March 31, 2025, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by April 21, 2025. CISA does not currently list it as used in ransomware campaigns. Cisco has 101 vulnerabilities in the KEV catalog, 7 of them linked to ransomware.

All 101 known-exploited Cisco vulnerabilities →

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.

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

CWE-912CWE-798

CISA Known-Exploited Vulnerability

Product: Cisco — Smart Licensing Utility

Name: Cisco Smart Licensing Utility Static Credential Vulnerability

Date added: 2025-03-31 · Due: 2025-04-21

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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