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CVE-2014-6278

GNU Bash OS Command Injection

8.8 HIGHActively exploited (CISA KEV)EPSS 99.6%
  1. Published30 Sept 2014
  2. Added to CISA KEV2 Oct 2025
  3. Remediation due23 Oct 2025
Actively exploited (CISA KEV)

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

Added to KEV: 2 Oct 2025Federal remediation due: 23 Oct 2025

Description

GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attackers to execute arbitrary commands via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-6271, CVE-2014-7169, and CVE-2014-6277.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Gnu Bash1.14.0 · 1.14.1 · 1.14.2 · 1.14.3

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

and 101 more references

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Frequently asked

Is CVE-2014-6278 being actively exploited?

Yes. CVE-2014-6278 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2 Oct 2025.

How severe is CVE-2014-6278?

CVE-2014-6278 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 99.6% probability of exploitation.

Which products are affected by CVE-2014-6278?

Affected products include Gnu Bash.

How do I fix CVE-2014-6278?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2014-6278 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.