Is CVE-2012-0463 being actively exploited?

CVE-2012-0463 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2012-0463?

CVE-2012-0463 has a CVSS 2.0 base score of 7.5 (HIGH).

CVE-2012-0463

HIGH · CVSS 7.5EPSS 4.1%EU EUVD

The nsWindow implementation in the browser engine in Mozilla Firefox before 3.6.28 and 4.x through 10.0, Firefox ESR 10.x before 10.0.3, Thunderbird before 3.1.20 and 5.0 through 10.0, Thunderbird ESR 10.x before 10.0.3, and SeaMonkey before 2.8 does not check the validity of an instance after event dispatching, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors, as demonstrated by Mobile Firefox on Android.

Key facts

CVSS score: 7.5 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-20
EPSS score: 4.1% (91th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2012-0495)
Published: March 14, 2012
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2012-0495 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

mozilla / firefox
mozilla / firefox
mozilla / firefox
mozilla / firefox
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey
mozilla / seamonkey

and 62 more…

References

http://lists.opensuse.org/opensuse-security-announce/2012-03/msg00014.html
http://lists.opensuse.org/opensuse-security-announce/2012-03/msg00015.html
http://lists.opensuse.org/opensuse-updates/2012-03/msg00042.html(Third Party Advisory)
http://secunia.com/advisories/48402
http://secunia.com/advisories/48553(Third Party Advisory)
http://secunia.com/advisories/48561(Third Party Advisory)
http://secunia.com/advisories/48624(Third Party Advisory)
http://secunia.com/advisories/48629(Third Party Advisory)
http://www.mozilla.org/security/announce/2012/mfsa2012-19.html(Vendor Advisory)
http://www.securityfocus.com/bid/52466(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id?1026801
http://www.securitytracker.com/id?1026803
http://www.securitytracker.com/id?1026804
https://bugzilla.mozilla.org/show_bug.cgi?id=688208(Issue Tracking, Vendor Advisory)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15143(Third Party Advisory)

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

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