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CVE-2014-7169

Critical 9.8 Exploited in the wild (KEV)

Confirmed active exploitation — CISA KEV catalog

Name
GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability
Added to catalog
Remediation due date (US federal)
Required action
Apply updates per vendor instructions.

Description

GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed function definitions in the values of environment variables, which allows remote attackers to write to files or possibly have unknown other impact 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.

Metrics

CVSS 3.1
9.8 (CRITICAL) Score source: NVD CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS — exploit probability
100% (percentile: 100) as of 1 November 2026
CWE
CWE-78

Affected products

gnu: bash; arista: eos; oracle: linux; qnap: qts; mageia: mageia; redhat: gluster storage server for on-premise; redhat: virtualization; redhat: enterprise linux; redhat: enterprise linux desktop; redhat: enterprise linux eus; redhat: enterprise linux for ibm z systems; redhat: enterprise linux for power big endian; redhat: enterprise linux for power big endian eus; redhat: enterprise linux for scientific computing; redhat: enterprise linux server

References