ExploitedIn CISA KEVFix available

CVE-2014-6278

Exploitation confirmed. First attested on 2025-10-02 by CISA-ADP, CISA KEV, GCVE · kevintel.

Published2014-09-30
WeaknessCWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2014-09-3010:55CVE publishedNVD
2025-10-02Added to the CISA KEV catalogCISA KEV
2025-10-02Listed as exploited by GCVEGCVE
2025-10-02Exploitation first reportedCISA KEV
2025-10-0203:55SSVC exploitation set to activeCISA-ADP
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2014-6278?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2014-6278?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Gnu bash

Branch	Affected	Fixed in	Source
1.14	= 1.14.0	no fix published	NVD
1.14	= 1.14.1	no fix published	NVD
1.14	= 1.14.2	no fix published	NVD
1.14	= 1.14.3	no fix published	NVD
1.14	= 1.14.4	no fix published	NVD
1.14	= 1.14.5	no fix published	NVD
1.14	= 1.14.6	no fix published	NVD
1.14	= 1.14.7	no fix published	NVD
2.0	= 2.0	no fix published	NVD
2.1	= 2.01	no fix published	NVD
2.1	= 2.01.1	no fix published	NVD
2.2	= 2.02	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

CISA’s required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. due 2025-10-23

Advisories and patches

lcamtuf.blogspot.comPatch
www.suse.comVendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: EDB-34860 EDB-34900 EDB-36933 EDB-39568 EDB-39887
Proof-of-concept repositories: none listed

CISA Known Exploited Vulnerability

Date Added: 2025-10-02
Patch Due Date: 2025-10-23
Ransomware Use: Unknown
Required Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Sources

CISA KEVKEV entry2025-10-02
GCVEexploitation2025-10-02
CISA-ADPSSVC decisionactive2025-10-02
OpenCVESSVC decisionactive—
CISA-ADPCVSS 3.18.82025-10-01
NVDCVSS 2.010read 2026-10-23
CISA-ADPweakness (CWE)CWE-782025-10-01
NVDweakness (CWE)CWE-78read 2026-10-23
FIRST EPSSEPSS score99.6 %read 2026-10-23
Exploit-DBdetectionread 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2014-09-30
Last Modified: 2026-06-17
NVD status: Analyzed

Frequently asked questions

What is CVE-2014-6278?

Is CVE-2014-6278 actively exploited?

Yes. CVE-2014-6278 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2025-10-23.

What is the CVSS score for CVE-2014-6278?

CVE-2014-6278 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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