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Vulnerability details: VCID-cxgc-yjjk-7fa4
Vulnerability ID VCID-cxgc-yjjk-7fa4
Aliases CVE-2016-5257
Summary Mozilla developers and community members Christoph Diehl, Andrew McCreight, Dan Minor, Byron Campen, Jon Coppeard, Steve Fink, Tyson Smith, Philipp, and Carsten Book reported memory safety bugs present in Firefox 48 and Firefox ESR 45.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort at least some of these could be exploited to run 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-2016-5257.json
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
epss 0.00817 https://api.first.org/data/v1/epss?cve=CVE-2016-5257
archlinux Critical https://security.archlinux.org/AVG-24
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2016-85
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2016-86
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2016-88
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-5257.json
https://api.first.org/data/v1/epss?cve=CVE-2016-5257
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5257
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5270
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5272
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5274
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5276
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5277
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5278
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5280
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5281
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5284
1377543 https://bugzilla.redhat.com/show_bug.cgi?id=1377543
ASA-201609-22 https://security.archlinux.org/ASA-201609-22
AVG-24 https://security.archlinux.org/AVG-24
mfsa2016-85 https://www.mozilla.org/en-US/security/advisories/mfsa2016-85
mfsa2016-86 https://www.mozilla.org/en-US/security/advisories/mfsa2016-86
mfsa2016-88 https://www.mozilla.org/en-US/security/advisories/mfsa2016-88
RHSA-2016:1912 https://access.redhat.com/errata/RHSA-2016:1912
RHSA-2016:1985 https://access.redhat.com/errata/RHSA-2016:1985
USN-3076-1 https://usn.ubuntu.com/3076-1/
USN-3112-1 https://usn.ubuntu.com/3112-1/
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-2016-5257.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 0.73411
EPSS Score 0.00817
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:13.325592+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2016/mfsa2016-86.yml 37.0.0