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CVE-2016-2805

28
FAUCET Score

CVE-2016-2805 is an unspecified memory corruption vulnerability in the browser engine of Mozilla Firefox ESR 38.x versions prior to 38.8. This high-severity flaw (CVSS 8.8) can be exploited remotely with low complexity, requiring user interaction, potentially leading to a denial of service (application crash) or arbitrary code execution. While no public exploit code or active exploitation has been identified, the vulnerability has garnered some community discussion and media coverage, indicating its potential impact. Organizations using affected Firefox ESR versions should update immediately to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
38.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:38.0:*:*:*:*:*:*:*
38.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:38.0.1:*:*:*:*:*:*:*
38.0.5CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:38.0.5:*:*:*:*:*:*:*
38.1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:38.1.0:*:*:*:*:*:*:*
38.1.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:38.1.1:*:*:*:*:*:*:*

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
4.65%
Probability of exploitation in next 30 days
EPSS Percentile
90.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0465 is in the 91st percentile among its peer group of 14,848 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

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 (7)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:45.1.0-1.el6_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:45.1.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:38.8.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:38.8.0-1.el7_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:38.8.0-2.el6_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:45.1.0-1.el7_2
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2016-2805Critical

Mozilla: Miscellaneous memory safety hazards (rv:38.8) (MFSA 2016-39)

Apr 26, 2016

References

lists.opensuse.org / opensuse-security-announce/2016-05/msg00023.html
lists.opensuse.org / opensuse-security-announce/2016-05/msg00054.html
lists.opensuse.org / opensuse-security-announce/2016-05/msg00057.html
rhn.redhat.com / errata/RHSA-2016-0695.html
rhn.redhat.com / errata/RHSA-2016-1041.html
bugzilla.mozilla.org / show_bug.cgi
security.gentoo.org / glsa/201701-15
debian.org / security/2016/dsa-3559
debian.org / security/2016/dsa-3576
mozilla.org / security/announce/2016/mfsa2016-39.html
Vendor Advisory
oracle.com / technetwork/topics/security/linuxbulletinapr2016-2952096.html
securitytracker.com / id/1035692
ubuntu.com / usn/USN-2973-1