How severe is CVE-2024-20439?

CVE-2024-20439 has a CVSS 3.1 base score of 9.8 (CRITICAL). EPSS estimates a 97.1% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2024-20439: Cisco Smart Licensing Utility Static Credential

CISA Known Exploited Vulnerabilities

Cisco Smart Licensing Utility Static Credential Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2025-03-31

Remediation 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.

CISA notes
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cslu-7gHMzWmw ; https://nvd.nist.gov/vuln/detail/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.

Severity

CVSS 3.1 · CNA9.8 CRITICAL

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

SSVC · CISA-ADP

Exploitationactive

Automatableyes

Technical impacttotal

Exploitation Context

as of October 13, 2026

All KEV statistics→

CISA added CVE-2024-20439 to the KEV catalog 208 days after its CVE record was published. The median for entries added in 2025 is 26 days.
It is one of 100 Cisco entries in the CISA KEV catalog, and one of 8 added in 2025.
Its current EPSS score (97.1%) is higher than that of 82% of CISA KEV entries.

Affected Products

Vendor	Product	Affected versions
Cisco	Cisco Cisco Smart License Utility	2.1.0 2.0.0 2.2.0

References

1 Links

Other references

cisco-sa-cslu-7gHMzWmw

Record Details

Published

2024-09-04

Last updated

2025-10-21

Assigner (CNA)

cisco

Credited to

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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.