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Exploited vulnerability · CISA KEV

Is CVE-2014-6278 exploited? Yes: in CISA KEV since 2 Oct 2025

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

Yes. CVE-2014-6278, GNU Bash OS Command Injection Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 2 Oct 2025, 4020 days after it was published. It affects GNU Bash. 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 · 2 Oct 2025
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity8.8CVSS 3.1 · high
US federal due23 Oct 2025BOD 22-01 deadline

What it is

GNU Bash contains an OS command injection vulnerability which allows remote attackers to execute arbitrary commands via a crafted environment.

VendorGNU (5 exploited CVEs in KEV)
ProductGNU Bash
VulnerabilityGNU Bash OS Command Injection Vulnerability
WeaknessCWE-78
Published30 Sep 2014
Added to KEV2 Oct 2025
Reported by (CNA)debian

What to do

  1. Check whether you run it. Look for GNU Bash 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 30 Sep 2014.
  4. Get told next time. Email alerts when CISA adds a CVE for GNU.

References

Questions

Is CVE-2014-6278 being exploited?

Yes. CISA added CVE-2014-6278 to the Known Exploited Vulnerabilities catalog on 2 Oct 2025, which means there is reliable evidence of exploitation in the wild.

Is CVE-2014-6278 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-2014-6278?

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 GNU Bash 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 October 2025 · GNU scorecard · act-now radar.

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