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CVE-2016-1961

26
FAUCET Score

CVE-2016-1961 is a critical use-after-free vulnerability in the nsHTMLDocument::SetBody function within Mozilla Firefox (versions before 45.0 and Firefox ESR 38.x before 38.7), as well as affected products from OpenSUSE, Oracle, and SUSE. This flaw allows remote attackers to execute arbitrary code by manipulating a root element, earning a CVSSv3 score of 8.8 (High) due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While no public exploit code (Metasploit, Nuclei, ExploitDB) is listed and it's not in CISA's KEV catalog, its high FAUCET Risk Score of 70/100, single media mention, and limited community discussion suggest it was a significant concern at the time of discovery.

Impacted Technologies

VendorProductVersion(s)CPE
42.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
13.1CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
13.2CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
12.0CPE matchmatch criteria
cpe:2.3:o:suse:linux_enterprise:12.0:*:*:*:*:*:*:*
<= 44.0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

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
2.89%
Probability of exploitation in next 30 days
EPSS Percentile
85.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0289 is in the 85th 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 (7)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:38.7.0-1.el6_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:38.7.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:38.7.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:38.7.0-1.el7_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:38.7.0-1.el6_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:38.7.0-1.el7_2
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2016-1961Critical

Mozilla: Use-after-free in SetBody (MFSA 2016-24)

Mar 8, 2016

References

hg.mozilla.org / releases/mozilla-release/rev/b208427885d3
lists.opensuse.org / opensuse-security-announce/2016-03/msg00027.html
lists.opensuse.org / opensuse-security-announce/2016-03/msg00029.html
lists.opensuse.org / opensuse-security-announce/2016-03/msg00031.html
lists.opensuse.org / opensuse-security-announce/2016-03/msg00050.html
lists.opensuse.org / opensuse-security-announce/2016-03/msg00068.html
lists.opensuse.org / opensuse-security-announce/2016-03/msg00089.html
lists.opensuse.org / opensuse-security-announce/2016-03/msg00091.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-03/msg00093.html
lists.opensuse.org / opensuse-security-announce/2016-07/msg00006.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-07/msg00007.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-07/msg00008.html
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
Issue Tracking
security.gentoo.org / glsa/201605-06
debian.org / security/2016/dsa-3510
debian.org / security/2016/dsa-3520
mozilla.org / security/announce/2016/mfsa2016-24.html
Vendor Advisory
oracle.com / technetwork/topics/security/linuxbulletinjan2016-2867209.html
Third Party Advisory
securitytracker.com / id/1035215
ubuntu.com / usn/USN-2917-1
ubuntu.com / usn/USN-2917-2
ubuntu.com / usn/USN-2917-3
ubuntu.com / usn/USN-2934-1
zerodayinitiative.com / advisories/ZDI-16-199