# CVE-2010-3765

Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x before 2.0.10, when JavaScript is enabled, allows remote attackers to execute arbitrary code via vectors related to nsCSSFrameConstructor::ContentAppended, the appendChild method, incorrect index tracking, and the creation of multiple frames, which triggers memory corruption, as exploited in the wild in October 2010 by the Belmoo malware.

- Page: https://www.vulneraibility.com/cve/CVE-2010-3765
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2025-10-06; CISA due date 2025-10-27
- EPSS: 83.16%
- Public exploit code: 4 on Exploit-DB · 1 Metasploit module (first 2010-10-28)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2025-10-04)
- Weakness: CWE-119
- Published: 2010-10-28

## Affected

- mozilla:firefox
- mozilla:thunderbird
- mozilla:seamonkey

## References

- [other] http://www.securityfocus.com/bid/44425
- [advisory] https://rhn.redhat.com/errata/RHSA-2010-0812.html
- [other] https://bugzilla.mozilla.org/show_bug.cgi?id=607222#c53
- [other] http://www.vupen.com/english/advisories/2010/2837
- [other] https://bugzilla.redhat.com/show_bug.cgi?id=646997
- [other] http://support.avaya.com/css/P8/documents/100114335
- [advisory] http://secunia.com/advisories/41965
- [advisory] http://secunia.com/advisories/41975
- [advisory] http://www.redhat.com/support/errata/RHSA-2010-0896.html
- [advisory] http://www.redhat.com/support/errata/RHSA-2010-0808.html
- [exploit] http://www.exploit-db.com/exploits/15341
- [other] http://www.securitytracker.com/id?1024651
- [advisory] http://secunia.com/advisories/41761
- [other] https://bugzilla.mozilla.org/show_bug.cgi?id=607222
- [advisory] http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050233.html
- [other] http://norman.com/about_norman/press_center/news_archive/2010/129223/en?utm_source=twitterfeed&utm_medium=twitter
- [advisory] http://secunia.com/advisories/41969
- [advisory] http://www.ubuntu.com/usn/USN-1011-3
- [other] http://blogs.sun.com/security/entry/multiple_vulnerabilities_in_mozilla_firefox
- [other] http://www.norman.com/about_norman/press_center/news_archive/2010/129223/
- [advisory] http://www.ubuntu.com/usn/usn-1011-1
- [other] http://www.securitytracker.com/id?1024650
- [advisory] http://www.ubuntu.com/usn/USN-1011-2
- [advisory] http://www.redhat.com/support/errata/RHSA-2010-0809.html
- [advisory] http://www.mandriva.com/security/advisories?name=MDVSA-2010:219
- [advisory] http://secunia.com/advisories/42867
- [other] http://blog.mozilla.com/security/2010/10/26/critical-vulnerability-in-firefox-3-5-and-firefox-3-6/
- [other] http://www.vupen.com/english/advisories/2010/2857
- [other] http://www.vupen.com/english/advisories/2011/0061
- [other] http://support.avaya.com/css/P8/documents/100114329
- [advisory] http://www.debian.org/security/2010/dsa-2124
- [other] http://www.securitytracker.com/id?1024645
- [advisory] http://secunia.com/advisories/42043
- [other] http://www.norman.com/security_center/virus_description_archive/129146/
- [advisory] http://secunia.com/advisories/41966
- [advisory] http://www.mandriva.com/security/advisories?name=MDVSA-2010:213
- [advisory] http://secunia.com/advisories/42008
- [advisory] http://lists.fedoraproject.org/pipermail/package-announce/2010-October/050061.html
- [advisory] http://slackware.com/security/viewer.php?l=slackware-security&y=2010&m=slackware-security.556706
- [other] http://www.vupen.com/english/advisories/2010/2871
- [other] http://isc.sans.edu/diary.html?storyid=9817
- [advisory] http://www.redhat.com/support/errata/RHSA-2010-0810.html
- [other] http://www.mozilla.org/security/announce/2010/mfsa2010-73.html
- [exploit] http://www.exploit-db.com/exploits/15352
- [other] https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12108
- [advisory] http://secunia.com/advisories/42003
- [advisory] http://lists.fedoraproject.org/pipermail/package-announce/2010-October/050077.html
- [advisory] http://www.redhat.com/support/errata/RHSA-2010-0861.html
- [advisory] http://lists.fedoraproject.org/pipermail/package-announce/2010-October/050154.html
- [exploit] http://www.exploit-db.com/exploits/15342

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