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Exploited vulnerability · CISA KEV

Is CVE-2024-20439 exploited? Yes: in CISA KEV since 31 Mar 2025

Gociux · Cisco Smart Licensing Utility · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2024-20439, Cisco Smart Licensing Utility Static Credential Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 31 Mar 2025, 208 days after it was published. It affects Cisco Smart Licensing Utility. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 31 Mar 2025
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity9.8CVSS 3.1 · critical
US federal due21 Apr 2025BOD 22-01 deadline

What it is

Cisco Smart Licensing Utility contains a static credential vulnerability that allows an unauthenticated, remote attacker to log in to an affected system and gain administrative credentials.

VendorCisco (103 exploited CVEs in KEV)
ProductSmart Licensing Utility
VulnerabilityCisco Smart Licensing Utility Static Credential Vulnerability
WeaknessCWE-912
Published4 Sep 2024
Added to KEV31 Mar 2025
Reported by (CNA)cisco

What to do

  1. Check whether you run it. Look for Smart Licensing Utility in your asset inventory, including appliances and cloud images. Stack check lists every exploited Cisco CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 4 Sep 2024.
  4. Get told next time. Email alerts when CISA adds a CVE for Cisco.

References

Questions

Is CVE-2024-20439 being exploited?

Yes. CISA added CVE-2024-20439 to the Known Exploited Vulnerabilities catalog on 31 Mar 2025, which means there is reliable evidence of exploitation in the wild.

Is CVE-2024-20439 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2024-20439?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check Cisco's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Smart Licensing Utility and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in March 2025 · Cisco scorecard · act-now radar.

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