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CVE-2018-5145

29
FAUCET Score

CVE-2018-5145 describes memory safety bugs in Firefox ESR and Thunderbird versions prior to 52.7. These vulnerabilities, rated as Critical (CVSS 9.8), could lead to memory corruption and potentially arbitrary code execution due to their network-based, low-complexity attack vector with no user interaction required. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the high severity warrants attention.

Impacted Technologies

VendorProductVersion(s)CPE
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.97%
Probability of exploitation in next 30 days
EPSS Percentile
85.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0297 is in the 77th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 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 0.0 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-2018-5145Critical

Mozilla: Memory safety bugs fixed in Firefox ESR 52.7 (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 / buglist.cgi
Issue TrackingPermissions RequiredThird Party Advisory
lists.debian.org / debian-lts-announce/2018/03/msg00010.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2018/03/msg00029.html
Mailing ListThird Party Advisory
security.gentoo.org / glsa/201811-13
Third Party Advisory
usn.ubuntu.com / 3545-1
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/mfsa2018-07
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-09
Vendor Advisory
securityfocus.com / bid/103384
Third Party AdvisoryVDB Entry
securitytracker.com / id/1040514
Third Party AdvisoryVDB Entry