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Vulnerability details: VCID-gqbc-wbhs-4bbx
Vulnerability ID VCID-gqbc-wbhs-4bbx
Aliases CVE-2016-5256
Summary Multiple vulnerabilities have been found in Mozilla Firefox and Thunderbird the worst of which could lead to the execution of arbitrary code.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (0)
There are no known CWE.
System Score Found at
cvssv3 9.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-5256.json
epss 0.0171 https://api.first.org/data/v1/epss?cve=CVE-2016-5256
epss 0.0171 https://api.first.org/data/v1/epss?cve=CVE-2016-5256
epss 0.0171 https://api.first.org/data/v1/epss?cve=CVE-2016-5256
epss 0.0171 https://api.first.org/data/v1/epss?cve=CVE-2016-5256
epss 0.0171 https://api.first.org/data/v1/epss?cve=CVE-2016-5256
epss 0.0171 https://api.first.org/data/v1/epss?cve=CVE-2016-5256
epss 0.0171 https://api.first.org/data/v1/epss?cve=CVE-2016-5256
epss 0.0171 https://api.first.org/data/v1/epss?cve=CVE-2016-5256
epss 0.0171 https://api.first.org/data/v1/epss?cve=CVE-2016-5256
archlinux Critical https://security.archlinux.org/AVG-24
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2016-85
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-5256.json
https://api.first.org/data/v1/epss?cve=CVE-2016-5256
1377666 https://bugzilla.redhat.com/show_bug.cgi?id=1377666
ASA-201609-22 https://security.archlinux.org/ASA-201609-22
AVG-24 https://security.archlinux.org/AVG-24
GLSA-201701-15 https://security.gentoo.org/glsa/201701-15
mfsa2016-85 https://www.mozilla.org/en-US/security/advisories/mfsa2016-85
USN-3076-1 https://usn.ubuntu.com/3076-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-5256.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.82266
EPSS Score 0.0171
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:10:18.385791+00:00 Gentoo Importer Import https://security.gentoo.org/glsa/201701-15 38.0.0