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Exploited vulnerability · CISA KEV

Is CVE-2026-24061 exploited? Yes: in CISA KEV since 26 Jan 2026

Gociux · GNU InetUtils · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2026-24061, GNU InetUtils Argument Injection Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 26 Jan 2026, 5 days after it was published. It affects GNU InetUtils. 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 · 26 Jan 2026
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity9.8CVSS 3.1 · critical
US federal due16 Feb 2026BOD 22-01 deadline

What it is

GNU InetUtils contains an argument injection vulnerability in telnetd that could allow for remote authentication bypass via a "-f root" value for the USER environment variable.

VendorGNU (5 exploited CVEs in KEV)
ProductInetUtils
VulnerabilityGNU InetUtils Argument Injection Vulnerability
WeaknessCWE-88
Published21 Jan 2026
Added to KEV26 Jan 2026
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for InetUtils in your asset inventory, including appliances and cloud images. Stack check lists every exploited GNU 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 21 Jan 2026.
  4. Get told next time. Email alerts when CISA adds a CVE for GNU.

References

Questions

Is CVE-2026-24061 being exploited?

Yes. CISA added CVE-2026-24061 to the Known Exploited Vulnerabilities catalog on 26 Jan 2026, which means there is reliable evidence of exploitation in the wild.

Is CVE-2026-24061 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-2026-24061?

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 GNU's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected InetUtils 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 January 2026 · GNU scorecard · act-now radar.

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