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Vulnerability details: VCID-u1nc-fgsw-mkhc
Vulnerability ID VCID-u1nc-fgsw-mkhc
Aliases CVE-2017-5374
Summary Mozilla developers and community members Gary Kwong, Olli Pettay, Tooru Fujisawa, Carsten Book, Andrew McCreight, Chris Pearce, Ronald Crane, Jan de Mooij, Julian Seward, Nicolas Pierron, Randell Jesup, Esther Monchari, Honza Bambas, and Philipp reported memory safety bugs present in Firefox 50.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that 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 (1)
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
System Score Found at
epss 0.01847 https://api.first.org/data/v1/epss?cve=CVE-2017-5374
epss 0.01847 https://api.first.org/data/v1/epss?cve=CVE-2017-5374
epss 0.01847 https://api.first.org/data/v1/epss?cve=CVE-2017-5374
epss 0.01847 https://api.first.org/data/v1/epss?cve=CVE-2017-5374
epss 0.01847 https://api.first.org/data/v1/epss?cve=CVE-2017-5374
epss 0.01847 https://api.first.org/data/v1/epss?cve=CVE-2017-5374
epss 0.01847 https://api.first.org/data/v1/epss?cve=CVE-2017-5374
epss 0.01847 https://api.first.org/data/v1/epss?cve=CVE-2017-5374
epss 0.01847 https://api.first.org/data/v1/epss?cve=CVE-2017-5374
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2017-5374
cvssv3 9.8 https://nvd.nist.gov/vuln/detail/CVE-2017-5374
archlinux Critical https://security.archlinux.org/AVG-157
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2017-01
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2017-5374
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1325344%2C1317501%2C1311319%2C1329989%2C1300145%2C1322305%2C1288561%2C1295747%2C1318766%2C1297808%2C1321374%2C1324810%2C1313385%2C1319888%2C1302231%2C1307458%2C1293327%2C1315447%2C1319456
https://www.mozilla.org/security/advisories/mfsa2017-01/
http://www.securityfocus.com/bid/95759
http://www.securitytracker.com/id/1037693
ASA-201701-39 https://security.archlinux.org/ASA-201701-39
AVG-157 https://security.archlinux.org/AVG-157
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
CVE-2017-5374 https://nvd.nist.gov/vuln/detail/CVE-2017-5374
mfsa2017-01 https://www.mozilla.org/en-US/security/advisories/mfsa2017-01
USN-3175-1 https://usn.ubuntu.com/3175-1/
No exploits are available.
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2017-5374
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2017-5374
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 0.82917
EPSS Score 0.01847
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:16:47.765110+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2017/mfsa2017-01.yml 38.0.0