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CVE-2018-5127

28
FAUCET Score

CVE-2018-5127 describes a high-severity buffer overflow vulnerability affecting Mozilla Firefox (versions prior to 59), Firefox ESR (prior to 52.7), and Thunderbird (prior to 52.7). This flaw occurs when manipulating the SVG "animatedPathSegList" via script, leading to a potentially exploitable crash. The vulnerability has a CVSS score of 8.8 (High), indicating it can be exploited remotely with low complexity, requiring user interaction, and potentially leading to high impact on confidentiality, integrity, and availability. While the EPSS score suggests a low likelihood of exploitation compared to most CVEs, there is no public exploit code available, nor is it listed in the CISA KEV catalog, indicating it is not currently under active exploitation. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
7.4CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
8.02%
Probability of exploitation in next 30 days
EPSS Percentile
94.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0802 is in the 94th percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:52.7.0-1.el6_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:52.7.0-1.el6_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:52.7.0-1.el7_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:52.7.0-1.el7_4
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2018-5127Important

Mozilla: Buffer overflow manipulating SVG animatedPathSegList (MFSA 2018-07)

Mar 14, 2018

References

access.redhat.com / errata/RHSA-2018:0526
Third Party Advisory
access.redhat.com / errata/RHSA-2018:0527
Third Party Advisory
access.redhat.com / errata/RHSA-2018:0647
Third Party Advisory
access.redhat.com / errata/RHSA-2018:0648
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
Issue TrackingPermissions Required
lists.debian.org / debian-lts-announce/2018/03/msg00010.html
Third Party Advisory
lists.debian.org / debian-lts-announce/2018/03/msg00029.html
Third Party Advisory
security.gentoo.org / glsa/201810-01
Third Party Advisory
security.gentoo.org / glsa/201811-13
Third Party Advisory
usn.ubuntu.com / 3545-1
Third Party Advisory
usn.ubuntu.com / 3596-1
Third Party Advisory
debian.org / security/2018/dsa-4139
Third Party Advisory
debian.org / security/2018/dsa-4155
Third Party Advisory
mozilla.org / security/advisories/mfsa2018-06
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-07
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-09
Vendor Advisory
securityfocus.com / bid/103388
Third Party AdvisoryVDB Entry
securitytracker.com / id/1040514
Third Party AdvisoryVDB Entry