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CVE-2016-5278

28
FAUCET Score

CVE-2016-5278 describes a heap-based buffer overflow in the nsBMPEncoder::AddImageFrame function affecting Mozilla Firefox before version 49.0, Firefox ESR 45.x before 45.4, and Thunderbird before 45.4. This vulnerability allows remote attackers to execute arbitrary code by tricking a user into opening a specially crafted image. With a CVSS score of 8.8 (High), it presents a significant risk due to its low attack complexity and high potential for confidentiality, integrity, and availability impact. While no public exploit code or Metasploit modules are available, the vulnerability has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
<= 48.0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
45.1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:45.1.0:*:*:*:*:*:*:*
45.1.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:45.1.1:*:*:*:*:*:*:*
45.2.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:45.2.0:*:*:*:*:*:*:*
45.3.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:45.3.0:*:*:*:*:*:*:*

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
4.16%
Probability of exploitation in next 30 days
EPSS Percentile
89.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0416 is in the 90th percentile among its peer group of 14,855 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 (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:45.4.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:45.4.0-1.el6_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:45.4.0-1.el7_2
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2016-5278Critical

Mozilla: Heap-buffer-overflow in nsBMPEncoder::AddImageFrame (MFSA 2016-85, MFSA 2016-86)

Sep 20, 2016

References

rhn.redhat.com / errata/RHSA-2016-1912.html
bugzilla.mozilla.org / show_bug.cgi
Issue Tracking
security.gentoo.org / glsa/201701-15
mozilla.org / security/advisories/mfsa2016-86
mozilla.org / security/advisories/mfsa2016-88
debian.org / security/2016/dsa-3674
mozilla.org / security/announce/2016/mfsa2016-85.html
Vendor Advisory
oracle.com / technetwork/topics/security/linuxbulletinoct2016-3090545.html
securityfocus.com / bid/93049
securitytracker.com / id/1036852