CVE-2024-20439

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.

References

https://www.bleepingcomputer.com/news/security/cisco-webex-bug-lets-hackers-gain-code-execution-via-meeting-links/

https://www.securityweek.com/vulnerabilities-expose-cisco-meraki-and-ece-products-to-dos-attacks/

https://www.helpnetsecurity.com/2025/04/03/attackers-are-leveraging-cisco-smart-licensing-utility-static-admin-credentials-cve-2024-20439/

https://www.bleepingcomputer.com/news/security/cisco-warns-of-cslu-backdoor-admin-account-used-in-attacks/

https://www.cisa.gov/news-events/alerts/2025/03/31/cisa-adds-one-known-exploited-vulnerability-catalog

https://securityaffairs.com/176073/hacking/u-s-cisa-adds-cisco-smart-licensing-utility-flaw-known-exploited-vulnerabilities-catalog.html

https://thehackernews.com/2025/03/ongoing-cyber-attacks-exploit-critical.html

https://www.securityweek.com/hackers-target-cisco-smart-licensing-utility-vulnerabilities/

https://www.bleepingcomputer.com/news/security/critical-cisco-smart-licensing-utility-flaws-now-exploited-in-attacks/

https://isc.sans.edu/diary/rss/31782

https://starkeblog.com/cve-wednesday/cisco/2024/09/20/cve-wednesday-cve-2024-20439.html

https://www.bleepingcomputer.com/news/security/cisco-warns-of-backdoor-admin-account-in-smart-licensing-utility/

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cslu-7gHMzWmw

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3