CVE-2014-1486

CVE-2014-1486 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 3.x base score of 9.8. 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-416.

Key facts

• Severity: Critical (CVSS 3.x base score 9.8)
• CVSS v2: 10.0
• EPSS exploit prediction: 7% (93rd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-416
• Affected product: Mozilla Firefox
• Published: 2014-02-06
• Last modified: 2026-06-17

Description

Use-after-free vulnerability in the imgRequestProxy function in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, and SeaMonkey before 2.24 allows remote attackers to execute arbitrary code via vectors involving unspecified Content-Type values for image data.

Frequently asked questions

What is CVE-2014-1486?

Use-after-free vulnerability in the imgRequestProxy function in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, and SeaMonkey before 2.24 allows remote attackers to execute arbitrary code via vectors involving unspecified Content-Type values for image data.

How severe is CVE-2014-1486?

CVE-2014-1486 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2014-1486 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-1486?

CVE-2014-1486 primarily affects Mozilla Firefox. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-1486?

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

When was CVE-2014-1486 published?

CVE-2014-1486 was published on 2014-02-06 and last updated on 2026-06-17.

References

• http://download.novell.com/Download?buildid=VYQsgaFpQ2k
• http://download.novell.com/Download?buildid=Y2fux-JW1Qc
• http://lists.fedoraproject.org/pipermail/package-announce/2014-February/127966.html
• http://lists.fedoraproject.org/pipermail/package-announce/2014-February/129218.html
• http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00004.html
• http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00005.html
• http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00010.html
• http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00017.html
• http://osvdb.org/102872
• http://rhn.redhat.com/errata/RHSA-2014-0132.html
• http://rhn.redhat.com/errata/RHSA-2014-0133.html
• http://secunia.com/advisories/56706
• http://secunia.com/advisories/56761
• http://secunia.com/advisories/56763
• http://secunia.com/advisories/56767
• http://secunia.com/advisories/56787
• http://secunia.com/advisories/56858
• http://secunia.com/advisories/56888
• http://secunia.com/advisories/56922
• http://www.debian.org/security/2014/dsa-2858
• http://www.mozilla.org/security/announce/2014/mfsa2014-08.html
• http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
• http://www.securityfocus.com/bid/65334
• http://www.securitytracker.com/id/1029717
• http://www.securitytracker.com/id/1029720
• http://www.securitytracker.com/id/1029721
• http://www.ubuntu.com/usn/USN-2102-1
• http://www.ubuntu.com/usn/USN-2102-2
• http://www.ubuntu.com/usn/USN-2119-1
• https://8pecxstudios.com/?page_id=44080

Affected products (22)

• cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:19:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:20:*:*:*:*:*:*:*
• cpe:2.3:a:suse:suse_linux_enterprise_software_development_kit:11.0:sp3:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:12.3:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_desktop:11:sp3:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:11:sp3:*:*:*:-:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:11:sp3:*:*:*:vmware:*:*
• cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:13.10:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_eus:6.5:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_tus:6.5:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*

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All CVEs affecting Mozilla Firefox →

Other CWE-416 (Use After Free) vulnerabilities

• CVE-2026-13782 — Critical (CVSS 10.0): Use after free in Browser in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the…
• CVE-2026-4725 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149…
• CVE-2026-4688 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox…
• CVE-2025-24085 — Critical (CVSS 10.0): A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.3 and iPadOS 18.3,…
• CVE-2024-43102 — Critical (CVSS 10.0): Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of…
• CVE-2021-32495 — Critical (CVSS 10.0): Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory…

Browse all CWE-416 (Use After Free) vulnerabilities →