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Vulnerability details: VCID-j8em-cfvw-5bba
Vulnerability ID VCID-j8em-cfvw-5bba
Aliases CVE-2018-5186
Summary Mozilla developers and community members Christian Holler, Jason Kratzer, Jon Coppeard, Randell Jesup, Ronald Crane, and Boris Zbarsky reported memory safety bugs present in Firefox 60. 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 (2)
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
System Score Found at
cvssv3 9.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-5186.json
epss 0.02193 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
epss 0.02193 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
epss 0.02193 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
epss 0.02193 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
epss 0.02193 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
epss 0.02193 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
epss 0.02193 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
epss 0.02193 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
epss 0.02193 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
epss 0.02193 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
epss 0.02193 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
epss 0.02235 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
epss 0.02235 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
epss 0.02235 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
epss 0.02235 https://api.first.org/data/v1/epss?cve=CVE-2018-5186
cvssv3 8.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-5186
cvssv3 9.8 https://nvd.nist.gov/vuln/detail/CVE-2018-5186
archlinux Critical https://security.archlinux.org/AVG-727
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2018-15
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-5186.json
https://api.first.org/data/v1/epss?cve=CVE-2018-5186
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1464872%2C1463329%2C1419373%2C1412882%2C1413033%2C1444673%2C1454448%2C1453505%2C1438671
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://security.gentoo.org/glsa/201810-01
https://www.mozilla.org/security/advisories/mfsa2018-15/
http://www.securityfocus.com/bid/104557
http://www.securitytracker.com/id/1041193
1595038 https://bugzilla.redhat.com/show_bug.cgi?id=1595038
ASA-201806-14 https://security.archlinux.org/ASA-201806-14
AVG-727 https://security.archlinux.org/AVG-727
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:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
CVE-2018-5186 https://nvd.nist.gov/vuln/detail/CVE-2018-5186
mfsa2018-15 https://www.mozilla.org/en-US/security/advisories/mfsa2018-15
USN-3705-1 https://usn.ubuntu.com/3705-1/
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-2018-5186.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
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
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
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2018-5186
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-2018-5186
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 0.83815
EPSS Score 0.02193
Published At Aug. 3, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:52.442806+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2018/mfsa2018-15.yml 37.0.0