GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability

Added to KEV
2022-01-28
Federal due date
2022-07-28
Vendor
GNU
Product
Bourne-Again Shell (Bash)
EPSS
99.5th percentile (score 0.891, as of 2026-06-08)
NVD CVSS v3.1
Ransomware use
Unknown
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2014-7169

CISA short description

GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute code. This CVE correctly remediates the vulnerability in CVE-2014-6271.

Required action

Apply updates per vendor instructions.

EPSS percentile is the FIRST.org exploit-probability ranking as of the date noted above; it moves daily. CVSS reflects NVD's analysis at time of publication.