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CVE-2016-5290

33
FAUCET Score

CVE-2016-5290 describes critical memory safety bugs in Firefox versions prior to 50, Firefox ESR prior to 45.5, and Thunderbird prior to 45.5, which could lead to memory corruption. This vulnerability has a CVSS score of 9.8 (Critical), indicating it is easily exploitable over a network with no user interaction, potentially allowing for complete compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been confirmed, the high number of community mentions suggests significant attention. Despite its age, the high FAUCET Risk Score of 93/100 highlights its severe potential impact.

Impacted Technologies

VendorProductVersion(s)CPE
< 45.5.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 50.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 45.5.0CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

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
3.22%
Probability of exploitation in next 30 days
EPSS Percentile
86.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0322 is in the 79th percentile among its peer group of 36,835 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

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 (7)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:45.5.0-1.el6_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:45.5.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:45.5.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:45.5.0-1.el7_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:45.5.0-1.el6_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:45.5.0-1.el7_3
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2016-5290Critical

Mozilla: Memory safety bugs fixed in Firefox 45.5 (MFSA 2016-90)

Nov 16, 2016

References

rhn.redhat.com / errata/RHSA-2016-2780.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2016-2825.html
Third Party Advisory
bugzilla.mozilla.org / buglist.cgi
Vendor Advisory
security.gentoo.org / glsa/201701-15
Third Party Advisory
debian.org / security/2016/dsa-3730
Third Party Advisory
mozilla.org / security/advisories/mfsa2016-89
Vendor Advisory
mozilla.org / security/advisories/mfsa2016-90
Vendor Advisory
mozilla.org / security/advisories/mfsa2016-93
Vendor Advisory
securityfocus.com / bid/94335
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037298
Third Party AdvisoryVDB Entry