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CISA Known Exploited Vulnerability

This CVE is actively exploited in the wild. CISA mandates federal agencies to patch immediately.

CVE

CVE-2014-6271

9.8

CVSScritical

Exploitable remotely over the internet · no authentication required.

Description

GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code 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, aka "ShellShock." NOTE: the original fix for this issue was incorrect; CVE-2014-7169 has been assigned to cover the vulnerability that is still present after the incorrect fix.

Attack Vector

Network

Privileges Req.

None

User Interaction

None

Updated Sep 22, 2026View on NVD →

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CVE-2014-6271 Scanner

CVE-2014-6271 scanner - Remote Code Execution (RCE) vulnerability in GNU Bash

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