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.
Conclusion & alert: CVE-2014-6271 is rated Critical Active Threat (99.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 94.22%, 100th percentile). Core evidence: CISA KEV confirms active exploitation (added 2022-01-28) affecting GNU / Bourne-Again Shell (Bash). a weakness (CWE-78) Unauthenticated remote administrative access may be possible. Mandatory action: The CISA remediation deadline has passed—treat as an emergency patch priority.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
: GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability · CISA KEV detail
: 2022-01-28
: 2022-07-28
: Apply updates per vendor instructions.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 42938 | exploit_db | edb | 2017-10-02 | Exploit-DB ↗ |
| 40938 | exploit_db | edb | 2016-12-18 | Exploit-DB ↗ |
| 40619 | exploit_db | edb | 2016-10-21 | Exploit-DB ↗ |
| 39918 | exploit_db | edb | 2016-06-10 | Exploit-DB ↗ |
| 38849 | exploit_db | edb | 2015-12-02 | Exploit-DB ↗ |
| 37816 | exploit_db | edb | 2015-08-18 | Exploit-DB ↗ |
| 36609 | exploit_db | edb | 2015-04-02 | Exploit-DB ↗ |
| 36504 | exploit_db | edb | 2015-03-26 | Exploit-DB ↗ |
| 36503 | exploit_db | edb | 2015-03-26 | Exploit-DB ↗ |
| 35146 | exploit_db | edb | 2014-11-03 | Exploit-DB ↗ |
| 35115 | exploit_db | edb | 2014-10-29 | Exploit-DB ↗ |
| 34896 | exploit_db | edb | 2014-10-06 | Exploit-DB ↗ |
| 34900 | exploit_db | edb | 2014-10-06 | Exploit-DB ↗ |
| 34895 | exploit_db | edb | 2014-10-06 | Exploit-DB ↗ |
| 34879 | exploit_db | edb | 2014-10-04 | Exploit-DB ↗ |
| 34862 | exploit_db | edb | 2014-10-02 | Exploit-DB ↗ |
| 34860 | exploit_db | edb | 2014-10-02 | Exploit-DB ↗ |
| 34839 | exploit_db | edb | 2014-10-01 | Exploit-DB ↗ |
| 34765 | exploit_db | edb | 2014-09-25 | Exploit-DB ↗ |
| 34766 | exploit_db | edb | 2014-09-25 | Exploit-DB ↗ |
| 34777 | exploit_db | edb | 2014-09-25 | Exploit-DB ↗ |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-03-29 | 94.14% | 94.22% | +0.08% |
| 2 | 2026-03-16 | 94.22% | 94.14% | -0.08% |
| 3 | 2025-09-04 | — | 94.22% | — |
Full EPSS history (14 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2014-6271 not yet assigned priority: Debian including 1 source packages (bash), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2014-6271 |
gentoo
|
high | CVE-2014-6271: 1 GLSA(s) (201409-09), 1 atom(s) (app-shells/bash); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2014-6271 |
redhat
|
critical | — | https://access.redhat.com/security/cve/CVE-2014-6271 |
suse
|
high | CVE-2014-6271 severity important: SUSE including 122 source package names (Containment-Studio-SLE11_SP1-4.85.108-20141006120850, Containment-Studio-SLE11_SP3-5.04.108-20141006122525, …), 270 product×package rows across 60 product lines (HPE Helion OpenStack 8, SUSE Liberty Linux 7, … (60 product lines)): Fixed 195, Known Not Affected 75. | https://www.suse.com/security/cve/CVE-2014-6271/ |
ubuntu
|
high | CVE-2014-6271 high priority: Ubuntu including 1 source packages (bash), 4 status rows across 4 suites (lucid, precise, trusty, upstream): released 3, needs-triage 1. | https://ubuntu.com/security/CVE-2014-6271 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| gnu | bash | <= 4.3 | cpe:2.3:a:gnu:bash:*:*:*:*:*:*:*:* |
| arista | eos | >= 4.9.0, < 4.9.12 | cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* |
| arista | eos | >= 4.10.0, < 4.10.9 | cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* |
| arista | eos | >= 4.11.0, < 4.11.11 | cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* |
| arista | eos | >= 4.12.0, < 4.12.9 | cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* |
| arista | eos | >= 4.13.0, < 4.13.9 | cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* |
| arista | eos | >= 4.14.0, < 4.14.4f | cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* |
| oracle | linux | 4 | cpe:2.3:o:oracle:linux:4:*:*:*:*:*:*:* |
| oracle | linux | 5 | cpe:2.3:o:oracle:linux:5:-:*:*:*:*:*:* |
| oracle | linux | 6 | cpe:2.3:o:oracle:linux:6:-:*:*:*:*:*:* |
| qnap | qts | < 4.1.1 | cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:* |
| qnap | qts | 4.1.1 | cpe:2.3:o:qnap:qts:4.1.1:-:*:*:*:*:*:* |
| qnap | qts | 4.1.1 | cpe:2.3:o:qnap:qts:4.1.1:build_0927:*:*:*:*:*:* |
| mageia | mageia | 3.0 | cpe:2.3:o:mageia:mageia:3.0:*:*:*:*:*:*:* |
| mageia | mageia | 4.0 | cpe:2.3:o:mageia:mageia:4.0:*:*:*:*:*:*:* |
| redhat | gluster_storage_server_for_on-premise | 2.1 | cpe:2.3:a:redhat:gluster_storage_server_for_on-premise:2.1:*:*:*:*:*:*:* |
| redhat | virtualization | 3.4 | cpe:2.3:a:redhat:virtualization:3.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 4.0 | cpe:2.3:o:redhat:enterprise_linux:4.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 5.0 | cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 6.0 | cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 7.0 | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_desktop | 5.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_desktop | 6.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_desktop | 7.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 5.9 | cpe:2.3:o:redhat:enterprise_linux_eus:5.9:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 6.4 | cpe:2.3:o:redhat:enterprise_linux_eus:6.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 6.5 | cpe:2.3:o:redhat:enterprise_linux_eus:6.5:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 7.3 | cpe:2.3:o:redhat:enterprise_linux_eus:7.3:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 7.4 | cpe:2.3:o:redhat:enterprise_linux_eus:7.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 7.5 | cpe:2.3:o:redhat:enterprise_linux_eus:7.5:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 7.6 | cpe:2.3:o:redhat:enterprise_linux_eus:7.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 7.7 | cpe:2.3:o:redhat:enterprise_linux_eus:7.7:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_ibm_z_systems | 5.9_s390x | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:5.9_s390x:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_ibm_z_systems | 6.4_s390x | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:6.4_s390x:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_ibm_z_systems | 6.5_s390x | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:6.5_s390x:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_ibm_z_systems | 7.3_s390x | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:7.3_s390x:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_ibm_z_systems | 7.4_s390x | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:7.4_s390x:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_ibm_z_systems | 7.5_s390x | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:7.5_s390x:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_ibm_z_systems | 7.6_s390x | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:7.6_s390x:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_ibm_z_systems | 7.7_s390x | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:7.7_s390x:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_big_endian | 5.0_ppc | cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:5.0_ppc:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_big_endian | 5.9_ppc | cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:5.9_ppc:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_big_endian | 6.0_ppc64 | cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:6.0_ppc64:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_big_endian | 6.4_ppc64 | cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:6.4_ppc64:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_big_endian | 7.0_ppc64 | cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:7.0_ppc64:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_big_endian_eus | 6.5_ppc64 | cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian_eus:6.5_ppc64:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_big_endian_eus | 7.3_ppc64 | cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian_eus:7.3_ppc64:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_big_endian_eus | 7.4_ppc64 | cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian_eus:7.4_ppc64:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_big_endian_eus | 7.5_ppc64 | cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian_eus:7.5_ppc64:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_big_endian_eus | 7.6_ppc64 | cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian_eus:7.6_ppc64:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_big_endian_eus | 7.7_ppc64 | cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian_eus:7.7_ppc64:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_scientific_computing | 6.0 | cpe:2.3:o:redhat:enterprise_linux_for_scientific_computing:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_scientific_computing | 7.0 | cpe:2.3:o:redhat:enterprise_linux_for_scientific_computing:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server | 5.0 | cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server | 6.0 | cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server | 7.0 | cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 5.6 | cpe:2.3:o:redhat:enterprise_linux_server_aus:5.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 5.9 | cpe:2.3:o:redhat:enterprise_linux_server_aus:5.9:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 6.2 | cpe:2.3:o:redhat:enterprise_linux_server_aus:6.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 6.4 | cpe:2.3:o:redhat:enterprise_linux_server_aus:6.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 6.5 | cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.3 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.4 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.6 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.7 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_from_rhui | 5.0 | cpe:2.3:o:redhat:enterprise_linux_server_from_rhui:5.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_from_rhui | 6.0 | cpe:2.3:o:redhat:enterprise_linux_server_from_rhui:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_from_rhui | 7.0 | cpe:2.3:o:redhat:enterprise_linux_server_from_rhui:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 6.5 | cpe:2.3:o:redhat:enterprise_linux_server_tus:6.5:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 7.3 | cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 7.6 | cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 7.7 | cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:* |
| redhat | enterprise_linux_workstation | 5.0 | cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_workstation | 6.0 | cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_workstation | 7.0 | cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* |
| suse | studio_onsite | 1.3 | cpe:2.3:a:suse:studio_onsite:1.3:*:*:*:*:*:*:* |
| opensuse | opensuse | 12.3 | cpe:2.3:o:opensuse:opensuse:12.3:*:*:*:*:*:*:* |
| opensuse | opensuse | 13.1 | cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:* |
| opensuse | opensuse | 13.2 | cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* |
| suse | linux_enterprise_desktop | 11 | cpe:2.3:o:suse:linux_enterprise_desktop:11:sp3:*:*:*:*:*:* |