High 8.8Published Nov 21, 2012

CVE-2012-5830Use-after-free vulnerability in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 on Mac OS X allow…

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Use-after-free vulnerability in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 on Mac OS X allows remote attackers to execute arbitrary code via an HTML document.

CVSS: 8.8 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

mozilla firefox mozilla:firefox	before 17.0; from 10.0 before 10.0.11	NVD
mozilla seamonkey mozilla:seamonkey	before 2.14	NVD
mozilla thunderbird mozilla:thunderbird	before 17.0	NVD
mozilla thunderbird_esr mozilla:thunderbird_esr	from 10.0 before 10.0.11	NVD
redhat enterprise_linux_desktop redhat:enterprise_linux_desktop	5.0; 6.0	NVD
redhat enterprise_linux_eus redhat:enterprise_linux_eus	6.3	NVD
redhat enterprise_linux_server redhat:enterprise_linux_server	5.0; 6.0	NVD
redhat enterprise_linux_server_eus redhat:enterprise_linux_server_eus	6.3	NVD
redhat enterprise_linux_workstation redhat:enterprise_linux_workstation	5.0; 6.0	NVD
suse suse_linux_enterprise_software_development_kit suse:suse_linux_enterprise_software_development_kit	11.0	NVD
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References

References

http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00021.html	mailing-list, third-party-advisory
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00022.html	mailing-list, third-party-advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00090.html	mailing-list, third-party-advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00092.html	mailing-list, third-party-advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00093.html	mailing-list, third-party-advisory
http://osvdb.org/87598	broken-link
http://rhn.redhat.com/errata/RHSA-2012-1482.html	third-party-advisory
http://rhn.redhat.com/errata/RHSA-2012-1483.html	third-party-advisory
http://secunia.com/advisories/51359	broken-link
http://secunia.com/advisories/51360	broken-link
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.