CVE-2016-1953

CVE-2016-1953 is a high-severity vulnerability in Mozilla Firefox with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

• Severity: High (CVSS 3.x base score 8.8)
• CVSS v2: 6.8
• EPSS exploit prediction: 3% (87th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Mozilla Firefox
• Published: 2016-03-13
• Last modified: 2026-06-17

Description

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 45.0 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to js/src/jit/arm/Assembler-arm.cpp, and unknown other vectors.

Frequently asked questions

What is CVE-2016-1953?

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 45.0 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to js/src/jit/arm/Assembler-arm.cpp, and unknown other vectors.

How severe is CVE-2016-1953?

CVE-2016-1953 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-1953 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1953?

CVE-2016-1953 primarily affects Mozilla Firefox. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1953?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-1953 published?

CVE-2016-1953 was published on 2016-03-13 and last updated on 2026-06-17.

References

• http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00027.html
• http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00029.html
• http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00031.html
• http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00050.html
• http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00068.html
• http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00093.html
• http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00006.html
• http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00007.html
• http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00008.html
• http://www.mozilla.org/security/announce/2016/mfsa2016-16.html
• http://www.securitytracker.com/id/1035215
• http://www.ubuntu.com/usn/USN-2917-1
• http://www.ubuntu.com/usn/USN-2917-2
• http://www.ubuntu.com/usn/USN-2917-3
• https://bugzilla.mozilla.org/show_bug.cgi?id=1199171
• https://bugzilla.mozilla.org/show_bug.cgi?id=1205163
• https://bugzilla.mozilla.org/show_bug.cgi?id=1207958
• https://bugzilla.mozilla.org/show_bug.cgi?id=1224361
• https://bugzilla.mozilla.org/show_bug.cgi?id=1224363
• https://bugzilla.mozilla.org/show_bug.cgi?id=1224369
• https://bugzilla.mozilla.org/show_bug.cgi?id=1225618
• https://bugzilla.mozilla.org/show_bug.cgi?id=1234425
• https://bugzilla.mozilla.org/show_bug.cgi?id=1236519
• https://bugzilla.mozilla.org/show_bug.cgi?id=1238558
• https://bugzilla.mozilla.org/show_bug.cgi?id=1238935
• https://bugzilla.mozilla.org/show_bug.cgi?id=1241731
• https://bugzilla.mozilla.org/show_bug.cgi?id=1243555
• https://bugzilla.mozilla.org/show_bug.cgi?id=1243583
• https://bugzilla.mozilla.org/show_bug.cgi?id=1245866
• https://bugzilla.mozilla.org/show_bug.cgi?id=1247236

Affected products (19)

• cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.5.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.5.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.6.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
• cpe:2.3:a:novell:suse_package_hub_for_suse_linux_enterprise:12:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*

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