Is CVE-2014-1477 being actively exploited?

CVE-2014-1477 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2014-1477?

CVE-2014-1477 has a CVSS 3.1 base score of 9.8 (CRITICAL).

CVE-2014-1477

CRITICAL · CVSS 9.8EPSS 5.5%EU EUVD

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, and SeaMonkey before 2.24 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Key facts

CVSS score: 9.8 (v3.1)
Severity: CRITICAL
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS score: 5.5% (93th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2014-1553)
Published: February 6, 2014
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2014-1553 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
debian / debian linux
fedoraproject / fedora
fedoraproject / fedora
mozilla / firefox
mozilla / seamonkey
mozilla / thunderbird
opensuse / opensuse
opensuse / opensuse
opensuse / opensuse
redhat / enterprise linux desktop
redhat / enterprise linux desktop
redhat / enterprise linux eus
redhat / enterprise linux server
redhat / enterprise linux server
redhat / enterprise linux server aus
redhat / enterprise linux server eus
redhat / enterprise linux server tus
redhat / enterprise linux workstation
redhat / enterprise linux workstation
suse / suse linux enterprise desktop
suse / suse linux enterprise server
suse / suse linux enterprise server
suse / suse linux enterprise software development kit

Certified products that may be affected

3 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

SUSE Linux Enterprise Server 11 Service Pack 2 on IBM System z - SUSE Linux Products Gmbh - Common Criteria BSI-DSZ-CC-0852-2013 - archived
SUSE Linux Enterprise Server 11 Service Pack 2 including KVM virtualization - SUSE Linux Products Gmbh - Common Criteria BSI-DSZ-CC-0787-2013 - archived
Red Hat Enterprise Linux 5 OpenSSH-Server Cryptographic Module - Red Hat®, Inc. - FIPS 140 1384 - historical

References

http://download.novell.com/Download?buildid=VYQsgaFpQ2k(Broken Link)
http://download.novell.com/Download?buildid=Y2fux-JW1Qc(Broken Link)
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/127966.html(Mailing List, Third Party Advisory)
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/129218.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00004.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00005.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00010.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00017.html(Mailing List, Third Party Advisory)
http://osvdb.org/102864(Broken Link)
http://rhn.redhat.com/errata/RHSA-2014-0132.html(Third Party Advisory)
http://rhn.redhat.com/errata/RHSA-2014-0133.html(Third Party Advisory)
http://secunia.com/advisories/56706(Broken Link)
http://secunia.com/advisories/56761(Broken Link)
http://secunia.com/advisories/56763(Broken Link)
http://secunia.com/advisories/56767(Broken Link)
http://secunia.com/advisories/56787(Broken Link)
http://secunia.com/advisories/56858(Broken Link)
http://secunia.com/advisories/56888(Broken Link)
http://www.debian.org/security/2014/dsa-2858(Third Party Advisory)
http://www.mozilla.org/security/announce/2014/mfsa2014-01.html(Vendor Advisory)
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html(Third Party Advisory)
http://www.securityfocus.com/bid/65317(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1029717(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1029720(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1029721(Third Party Advisory, VDB Entry)
http://www.ubuntu.com/usn/USN-2102-1(Third Party Advisory)
http://www.ubuntu.com/usn/USN-2102-2(Third Party Advisory)
http://www.ubuntu.com/usn/USN-2119-1(Third Party Advisory)
https://8pecxstudios.com/?page_id=44080(Broken Link, URL Repurposed)
https://bugzilla.mozilla.org/show_bug.cgi?id=921470(Exploit, Issue Tracking, Vendor Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=925896(Exploit, Issue Tracking, Vendor Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=936808(Exploit, Issue Tracking, Vendor Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=937132(Exploit, Issue Tracking, Vendor Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=937697(Exploit, Issue Tracking, Vendor Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=945334(Exploit, Issue Tracking, Vendor Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=945939(Exploit, Issue Tracking)
https://bugzilla.mozilla.org/show_bug.cgi?id=950000(Exploit, Issue Tracking, Vendor Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=950438(Exploit, Issue Tracking, Vendor Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=951366(Exploit, Issue Tracking, Vendor Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=953114(Exploit, Issue Tracking, Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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