CVE Intelligence
CISA KEV Critical Injection exploit reference

CVE-2014-6271 — GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability

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.

Published Sep 24, 2014 · Updated Oct 13, 2026 · Sources: CISA Known Exploited Vulnerabilities, NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: debian

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

CISA KEV · Jan 28, 2022 Detection templates (Nuclei) · 1Metasploit modules · 10Exploit-DB · 21
How the score was calculated
  • Confirmed exploitation (CISA KEV)+35
  • Public exploit/PoC (nuclei, metasploit, exploitdb)+20
  • EPSS 100% (30-day exploitation probability)+15
  • Technical severity (critical)+10
  • Automatable exploitation (SSVC)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Confirmed
CISA KEV, listed Jan 28, 2022
EPSS FIRST
100%
ahead of 100% of scored CVEs · Oct 14, 2026
Affects
Apple
Mac Os X and 62 more
CVSS base
9.8
Critical · 4 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
Active
none · proof-of-concept · active
Automatable
Yes
can an attacker script the kill-chain steps
Technical impact
Total
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

CISA required action CISA

Apply updates per vendor instructions.

US federal deadline: Jul 28, 2022 — passed 1540 day(s) ago

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Apple Mac Os X, Arista Eos, Canonical Ubuntu Linux…).
  2. Treat as emergency remediation: the CVE is in CISA KEV (confirmed exploitation).
  3. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
  4. Apply the fixed version or the patch documented under Remediation.
  5. EPSS ahead of 100% of scored CVEs: prioritize it in the patch queue.
  6. Search available logs for exploit probes matching the vulnerability class (injection), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Apple Mac Os X ≥ 10.0.0 and < 10.10.0 Vulnerable NIST National Vulnerability Database
Arista Eos ≥ 4.9.0 and < 4.9.12≥ 4.10.0 and < 4.10.9≥ 4.11.0 and < 4.11.11≥ 4.12.0 and < 4.12.9≥ 4.13.0 and < 4.13.9≥ 4.14.0 and < 4.14.4f Vulnerable NIST National Vulnerability Database
Canonical Ubuntu Linux version 10.04version 12.04version 14.04 Vulnerable NIST National Vulnerability Database
Checkpoint Security Gateway < r77.30 Vulnerable NIST National Vulnerability Database
Citrix Netscaler Sdx Firmware < 9.3.67.5r1≥ 10 and < 10.1.129.11r1≥ 10.5 and < 10.5.52.11r1 Vulnerable NIST National Vulnerability Database
Debian Debian Linux version 7.0 Vulnerable NIST National Vulnerability Database
F5 Arx Firmware ≥ 6.0.0 and ≤ 6.4.0 Vulnerable NIST National Vulnerability Database
F5 Big-ip Access Policy Manager ≥ 10.1.0 and ≤ 10.2.4≥ 11.0.0 and ≤ 11.5.1version 11.6.0 Vulnerable NIST National Vulnerability Database
F5 Big-ip Advanced Firewall Manager ≥ 11.3.0 and ≤ 11.5.1version 11.6.0 Vulnerable NIST National Vulnerability Database
F5 Big-ip Analytics ≥ 11.0.0 and ≤ 11.5.1version 11.6.0 Vulnerable NIST National Vulnerability Database
F5 Big-ip Application Acceleration Manager ≥ 11.4.0 and ≤ 11.5.1version 11.6.0 Vulnerable NIST National Vulnerability Database
F5 Big-ip Application Security Manager ≥ 10.0.0 and ≤ 10.2.4≥ 11.0.0 and ≤ 11.5.1version 11.6.0 Vulnerable NIST National Vulnerability Database
F5 Big-ip Edge Gateway ≥ 10.1.0 and ≤ 10.2.4≥ 11.0.0 and ≤ 11.3.0 Vulnerable NIST National Vulnerability Database
F5 Big-ip Global Traffic Manager ≥ 10.0.0 and ≤ 10.2.4≥ 11.0.0 and ≤ 11.5.1version 11.6.0 Vulnerable NIST National Vulnerability Database
F5 Big-ip Link Controller ≥ 10.0.0 and ≤ 10.2.4≥ 11.0.0 and ≤ 11.5.1version 11.6.0 Vulnerable NIST National Vulnerability Database
F5 Big-ip Local Traffic Manager ≥ 10.0.0 and ≤ 10.2.4≥ 11.0.0 and ≤ 11.5.1version 11.6.0 Vulnerable NIST National Vulnerability Database
F5 Big-ip Policy Enforcement Manager ≥ 11.3.0 and ≤ 11.5.1version 11.6.0 Vulnerable NIST National Vulnerability Database
F5 Big-ip Protocol Security Module ≥ 10.0.0 and ≤ 10.2.4≥ 11.0.0 and ≤ 11.4.1 Vulnerable NIST National Vulnerability Database
F5 Big-ip Wan Optimization Manager ≥ 10.0.0 and ≤ 10.2.4≥ 11.0.0 and ≤ 11.3.0 Vulnerable NIST National Vulnerability Database
F5 Big-ip Webaccelerator ≥ 10.0.0 and ≤ 10.2.4≥ 11.0.0 and ≤ 11.3.0 Vulnerable NIST National Vulnerability Database
F5 Big-iq Cloud ≥ 4.0.0 and ≤ 4.4.0 Vulnerable NIST National Vulnerability Database
F5 Big-iq Device ≥ 4.2.0 and ≤ 4.4.0 Vulnerable NIST National Vulnerability Database
F5 Big-iq Security ≥ 4.0.0 and ≤ 4.4.0 Vulnerable NIST National Vulnerability Database
F5 Enterprise Manager ≥ 2.1.0 and ≤ 2.3.0≥ 3.0.0 and ≤ 3.1.1 Vulnerable NIST National Vulnerability Database
F5 Traffix Signaling Delivery Controller ≥ 4.0.0 and ≤ 4.0.5version 3.3.2version 3.4.1version 3.5.1version 4.1.0 Vulnerable NIST National Vulnerability Database
Gnu Bash ≤ 4.3 Vulnerable NIST National Vulnerability Database
Ibm Flex System V7000 Firmware ≥ 1.1.0.0 and < 7.1.0.11≥ 7.2.0.0 and < 7.2.0.9≥ 7.3.0.0 and < 7.3.0.7 Vulnerable NIST National Vulnerability Database
Ibm Infosphere Guardium Database Activity Monitoring version 8.2version 9.0version 9.1 Vulnerable NIST National Vulnerability Database
Ibm Pureapplication System ≥ 1.0.0.0 and ≤ 1.0.0.4≥ 1.1.0.0 and ≤ 1.1.0.4version 2.0.0.0 Vulnerable NIST National Vulnerability Database
Ibm Qradar Risk Manager version 7.1.0 Vulnerable NIST National Vulnerability Database
Ibm Qradar Security Information And Event Manager version 7.1.0version 7.1.0-mr1version 7.1.0-mr2version 7.1.1version 7.1.1-p1version 7.1.1-p2version 7.1.1-p3version 7.1.2
and 78 more version 7.1.2-p1version 7.1.2-p10version 7.1.2-p11version 7.1.2-p12version 7.1.2-p13version 7.1.2-p2version 7.1.2-p3version 7.1.2-p4version 7.1.2-p5version 7.1.2-p6version 7.1.2-p7version 7.1.2-p8version 7.1.2-p9version 7.2version 7.2.0version 7.2.0-p1version 7.2.0-p2version 7.2.0-p3version 7.2.1version 7.2.1-p1version 7.2.1-p2version 7.2.1-p3version 7.2.2version 7.2.2-p1version 7.2.2-p2version 7.2.2-p3version 7.2.2-p4version 7.2.3version 7.2.3-p1version 7.2.3-p2version 7.2.3-p3version 7.2.3-p4version 7.2.4version 7.2.4-p1version 7.2.4-p2version 7.2.4-p3version 7.2.4-p4version 7.2.4-p5version 7.2.4-p6version 7.2.5version 7.2.5-p1version 7.2.5-p2version 7.2.5-p3version 7.2.5-p4version 7.2.5-p5version 7.2.5-p6version 7.2.6version 7.2.6-p1version 7.2.6-p2version 7.2.6-p3version 7.2.6-p4version 7.2.6-p5version 7.2.6-p6version 7.2.6-p7version 7.2.7version 7.2.7-p1version 7.2.7-p2version 7.2.7-p3version 7.2.7-p4version 7.2.8version 7.2.8-p1version 7.2.8-p10version 7.2.8-p11version 7.2.8-p12version 7.2.8-p13version 7.2.8-p14version 7.2.8-p15version 7.2.8-p16version 7.2.8-p2version 7.2.8-p3version 7.2.8-p4version 7.2.8-p5version 7.2.8-p6version 7.2.8-p7version 7.2.8-p8version 7.2.8-p9version 7.2.8.15version 7.2.9
Vulnerable NIST National Vulnerability Database
Ibm Qradar Vulnerability Manager version 7.2.0version 7.2.1version 7.2.2version 7.2.3version 7.2.4version 7.2.6-p1version 7.2.6-p2version 7.2.6-p3
and 22 more version 7.2.6-p4version 7.2.6-p5version 7.2.6-p6version 7.2.6-p7version 7.2.8version 7.2.8-p1version 7.2.8-p10version 7.2.8-p11version 7.2.8-p12version 7.2.8-p13version 7.2.8-p14version 7.2.8-p15version 7.2.8-p16version 7.2.8-p17version 7.2.8-p2version 7.2.8-p3version 7.2.8-p4version 7.2.8-p5version 7.2.8-p6version 7.2.8-p7version 7.2.8-p8version 7.2.8-p9
Vulnerable NIST National Vulnerability Database
Ibm San Volume Controller Firmware ≥ 1.1.0.0 and < 7.1.0.11≥ 7.2.0.0 and < 7.2.0.9≥ 7.3.0.0 and < 7.3.0.7 Vulnerable NIST National Vulnerability Database
Ibm Security Access Manager For Mobile 8.0 Firmware version 8.0.0.1version 8.0.0.2version 8.0.0.3version 8.0.0.5 Vulnerable NIST National Vulnerability Database
Ibm Security Access Manager For Web 7.0 Firmware version 7.0.0.1version 7.0.0.2version 7.0.0.3version 7.0.0.4version 7.0.0.5version 7.0.0.6version 7.0.0.7version 7.0.0.8 Vulnerable NIST National Vulnerability Database
Ibm Security Access Manager For Web 8.0 Firmware version 8.0.0.2version 8.0.0.3version 8.0.0.5 Vulnerable NIST National Vulnerability Database
Ibm Smartcloud Entry Appliance version 2.3.0version 2.4.0version 3.1.0version 3.2.0 Vulnerable NIST National Vulnerability Database
Ibm Smartcloud Provisioning version 2.1.0 Vulnerable NIST National Vulnerability Database
Ibm Software Defined Network For Virtual Environments < 1.2.1 Vulnerable NIST National Vulnerability Database
Ibm Starter Kit For Cloud version 2.2.0 Vulnerable NIST National Vulnerability Database
Ibm Stn6500 Firmware ≥ 3.8.0.0 and < 3.8.0.07≥ 3.9.1.0 and < 3.9.1.08≥ 4.1.2.0 and < 4.1.2.06 Vulnerable NIST National Vulnerability Database
Ibm Stn6800 Firmware ≥ 3.8.0.0 and < 3.8.0.07≥ 3.9.1.0 and < 3.9.1.08≥ 4.1.2.0 and < 4.1.2.06 Vulnerable NIST National Vulnerability Database
Ibm Stn7800 Firmware ≥ 3.8.0.0 and < 3.8.0.07≥ 3.9.1.0 and < 3.9.1.08≥ 4.1.2.0 and < 4.1.2.06 Vulnerable NIST National Vulnerability Database
Ibm Storwize V3500 Firmware ≥ 1.1.0.0 and < 7.1.0.11≥ 7.2.0.0 and < 7.2.0.9≥ 7.3.0.0 and < 7.3.0.7 Vulnerable NIST National Vulnerability Database
Ibm Storwize V3700 Firmware ≥ 1.1.0.0 and < 7.1.0.11≥ 7.2.0.0 and < 7.2.0.9≥ 7.3.0.0 and < 7.3.0.7 Vulnerable NIST National Vulnerability Database
Ibm Storwize V5000 Firmware ≥ 1.1.0.0 and < 7.1.0.11≥ 7.2.0.0 and < 7.2.0.9≥ 7.3.0.0 and < 7.3.0.7 Vulnerable NIST National Vulnerability Database
Ibm Storwize V7000 Firmware ≥ 1.1.0.0 and < 1.4.3.5≥ 1.5.0.0 and < 1.5.0.4≥ 7.2.0.0 and < 7.2.0.9≥ 7.3.0.0 and < 7.3.0.7 Vulnerable NIST National Vulnerability Database
Ibm Workload Deployer ≥ 3.1.0 and ≤ 3.1.0.7 Vulnerable NIST National Vulnerability Database
Mageia Mageia version 3.0version 4.0 Vulnerable NIST National Vulnerability Database
Novell Open Enterprise Server version 2.0-sp3version 11.0-sp2 Vulnerable NIST National Vulnerability Database
Novell Zenworks Configuration Management version 10.3version 11version 11.1version 11.2version 11.3.0 Vulnerable NIST National Vulnerability Database
Opensuse Opensuse version 12.3version 13.1version 13.2 Vulnerable NIST National Vulnerability Database
Oracle Linux version 4version 5version 6 Vulnerable NIST National Vulnerability Database
Qnap Qts < 4.1.1version 4.1.1version 4.1.1-build_0927 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux version 4.0version 5.0version 6.0version 7.0 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Desktop version 5.0version 6.0version 7.0 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Eus version 5.9version 6.4version 6.5version 7.3version 7.4version 7.5version 7.6version 7.7 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Ibm Z Systems version 5.9_s390xversion 6.4_s390xversion 6.5_s390xversion 7.3_s390xversion 7.4_s390xversion 7.5_s390xversion 7.6_s390xversion 7.7_s390x Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Power Big Endian version 5.0_ppcversion 5.9_ppcversion 6.0_ppc64version 6.4_ppc64version 7.0_ppc64 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Power Big Endian Eus version 6.5_ppc64version 7.3_ppc64version 7.4_ppc64version 7.5_ppc64version 7.6_ppc64version 7.7_ppc64 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Scientific Computing version 6.0version 7.0 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Server version 5.0version 6.0version 7.0 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Server Aus version 5.6version 5.9version 6.2version 6.4version 6.5version 7.3version 7.4version 7.6
and 1 more version 7.7
Vulnerable NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
9.8 CVSS 3.1 Critical 3.9 5.9 nvd@nist.gov via NIST National Vulnerability Database
9.8 CVSS 3.1 Critical 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0 via NIST National Vulnerability Database
9.8 CVSS 3.1 Critical — — GitHub, Inc. via GitHub Security Advisories
9.8 CVSS 3.1 Critical — — CISA-ADP via CVE Program (cve.org) e CISA ADP
10.0 CVSS 2.0 High 10.0 10.0 nvd@nist.gov via NIST National Vulnerability Database
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-78 · OS Command Injection

Other CVEs with this weakness →

CISA KEV details CISA

CISA lists a CVE once it has evidence of exploitation against real targets.

Listed
Jan 28, 2022
Federal deadline
Jul 28, 2022
passed 1540 day(s) ago
Ransomware use
Unknown

CISA records ransomware use only for campaigns it has confirmed, so “Unknown” means unrecorded, not ruled out. The deadline binds US federal agencies; for everyone else it is a reference date.

Public exploits, PoCs and detection templates

Public code that demonstrates or tests the flaw raises the odds of mass exploitation — and Nuclei templates help find vulnerable assets in your environment.

Detection templates (Nuclei)
Metasploit modules
Exploit-DB

Warning: public PoCs are sometimes disguised malware. Use them only for authorized testing in an isolated environment. This portal does not host exploit code — it only points to the sources.

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 100.00%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
  • Look for parameters with command/query metacharacters and unexpected child processes of the service.
  • Hunt retroactively in logs from before Jan 28, 2022 (KEV listing): exploitation may have started earlier.
web/proxy/WAF logsnetwork IDS/IPSapplication logsendpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

  • 2026
  • SSVC assessment updated
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 13, 2026
  • Fix documented
    Oct 13, 2026 · NIST National Vulnerability Database
  • Affected products added · gnu/bash, arista/eos, oracle/linux, qnap/qts, mageia/mageia, redhat/gluster storage server for on-premise, redhat/virtua
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVSS changed · 9.8
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Analyzed
    Oct 13, 2026 · NIST National Vulnerability Database
  • Added to CISA KEV (detected)
    Oct 13, 2026 · CISA Known Exploited Vulnerabilities
  • Record created in this database
    Oct 13, 2026 · CISA Known Exploited Vulnerabilities
  • 2022
  • Added to CISA KEV catalog
    Jan 27, 2022 · CISA
  • 2014
  • CVE published
    Sep 24, 2014 · debian

Source activity

Repeated readings are counted rather than listed.

  • 2× References added · Oct 13, 2026 – Oct 13, 2026
  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

100 on the record

Elsewhere on this site

Apple
every CVE for this vendor
2022-01
what else CISA listed that month
Injection
same class
CWE-78
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-104045 Sssd: sssd: denial of service via race condition in autofs responder 9d
  • CVE-2026-104046 Sssd: sssd: denial of service via incomplete identity provider authentication requests 9d
  • CVE-2026-104048 Sssd: sssd: authorization bypass via cross-domain username collision in hbac evaluation 9d
  • CVE-2026-104047 Sssd: sssd: information disclosure via query injection in entra id lookups 9d
  • CVE-2026-102558 Libsoup: libsoup: heap buffer overflow during websocket receive-buffer growth 16d
  • CVE-2026-102555 Libsoup: libsoup: heap buffer overflow via uninitialized length in data-uri base64 decoding 16d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2014-6271 is "GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability", rated Critical. It affects Mac Os X (Apple); versions are in the scope table. It is in CISA KEV: there is evidence of real-world exploitation. CVSS 9.8 describes technical severity. EPSS 100.00% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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