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CVE-2014-6278

HIGH · CVSS 8.8CISA KEV: actively exploitedEPSS 99.7%EU EUVD: exploited

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.

Key facts

CVSS score
8.8 (v3.1)
Severity
HIGH
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE)
CWE-78
EPSS score
99.7% (100th percentile)
In CISA KEV
Yes, added October 2, 2025
In EU EUVD
Yes (EUVD-2014-6163)
Published
September 30, 2014
NVD last modified
June 17, 2026
Status
Analyzed

CISA Known Exploited Vulnerability

GNU Bash OS Command Injection Vulnerability

Added to the KEV catalog on October 2, 2025; federal remediation due October 23, 2025.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2014-6163 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on December 30, 2025.

View on the EU Vulnerability Database

Affected products

  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash
  • gnu / bash

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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