How severe is CVE-2024-20439?

CVE-2024-20439 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-20439 being actively exploited?

Yes. CVE-2024-20439 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-03-31, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2024-20439?

CVE-2024-20439 affects Cisco Smart License Utility. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-20439?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2024-20439 have an EU (EUVD) identifier?

Yes. CVE-2024-20439 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18154. It is also flagged as exploited in the EUVD (since 2025-03-31).

When was CVE-2024-20439 published?

CVE-2024-20439 was published on 2024-09-04 and last updated on 2026-06-17.

CVE-2024-20439

CVE-2024-20439 is a critical-severity vulnerability in Cisco Smart License Utility with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-03-31). The underlying weakness is classified as CWE-798.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 92% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-03-31)
EU (EUVD) id: EUVD-2024-18154
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-03-31)
Weakness: CWE-798
Affected product: Cisco Smart License Utility
Published: 2024-09-04
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2024-20439?: 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.
How severe is CVE-2024-20439?: CVE-2024-20439 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-20439 being actively exploited?: Yes. CVE-2024-20439 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-03-31, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2024-20439?: CVE-2024-20439 affects Cisco Smart License Utility. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-20439?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2024-20439 have an EU (EUVD) identifier?: Yes. CVE-2024-20439 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18154. It is also flagged as exploited in the EUVD (since 2025-03-31).
When was CVE-2024-20439 published?: CVE-2024-20439 was published on 2024-09-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cisco:smart_license_utility:*:*:*:*:*:*:*:*

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