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Vulnerability details: VCID-56jb-xrj9-dyf3
Vulnerability ID VCID-56jb-xrj9-dyf3
Aliases CVE-2017-5471
Summary Mozilla developers and community members Mats Palmgren, Philipp, Byron Campen, Christian Holler, Gary Kwong, Benjamin Bouvier, Bob Clary, Jon Coppeard, and Michael Layzell reported memory safety bugs present in Firefox 53. 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 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2017-5471
epss 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2017-5471
epss 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2017-5471
epss 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2017-5471
epss 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2017-5471
epss 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2017-5471
epss 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2017-5471
epss 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2017-5471
epss 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2017-5471
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2017-5471
cvssv3 9.8 https://nvd.nist.gov/vuln/detail/CVE-2017-5471
archlinux Critical https://security.archlinux.org/AVG-302
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2017-15
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2017-5471
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1349604%2C1318645%2C1361098%2C1361100%2C1341026%2C1349421%2C1360852%2C1299147%2C1352073%2C1354853%2C1366446%2C1342181%2C1343069
https://www.mozilla.org/security/advisories/mfsa2017-15/
http://www.securityfocus.com/bid/99042
http://www.securitytracker.com/id/1038689
ASA-201706-19 https://security.archlinux.org/ASA-201706-19
AVG-302 https://security.archlinux.org/AVG-302
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-2017-5471 https://nvd.nist.gov/vuln/detail/CVE-2017-5471
mfsa2017-15 https://www.mozilla.org/en-US/security/advisories/mfsa2017-15
USN-3315-1 https://usn.ubuntu.com/3315-1/
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-2017-5471
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-2017-5471
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 0.68325
EPSS Score 0.00564
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:16:45.727792+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2017/mfsa2017-15.yml 38.0.0