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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…
Critical9.8Known exploitedEPSS 83.2%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
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.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Mozilla Multiple Products Remote Code Execution Vulnerability.
- Added
- 6 Oct 2025
- Fix due (US federal)
- 27 Oct 2025
- Used by ransomware
- Not known
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 83.2% · top 0.3% of all CVEs (4 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: yes · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
n/a
- affected n/a
References (52)
- 44425 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- RHSA-2010:0812 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=607222#c53 (opens in a new tab)x_refsource_MISCx_transferred
- ADV-2010-2837 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=646997 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://support.avaya.com/css/P8/documents/100114335 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 41965 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 41975 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- RHSA-2010:0896 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2010:0808 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 15341 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- 1024651 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 41761 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=607222 (opens in a new tab)x_refsource_CONFIRMx_transferred
- FEDORA-2010-17105 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- http://norman.com/about_norman/press_center/news_archive/2010/129223/en?utm_source=twitterfeed&utm_medium=twitter (opens in a new tab)x_refsource_MISCx_transferred
- 41969 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- USN-1011-3 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- http://blogs.sun.com/security/entry/multiple_vulnerabilities_in_mozilla_firefox (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.norman.com/about_norman/press_center/news_archive/2010/129223/ (opens in a new tab)x_refsource_MISCx_transferred
- USN-1011-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 1024650 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- USN-1011-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- RHSA-2010:0809 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- MDVSA-2010:219 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- 42867 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://blog.mozilla.com/security/2010/10/26/critical-vulnerability-in-firefox-3-5-and-firefox-3-6/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- ADV-2010-2857 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- ADV-2011-0061 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- http://support.avaya.com/css/P8/documents/100114329 (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-2124 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 1024645 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 42043 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://www.norman.com/security_center/virus_description_archive/129146/ (opens in a new tab)x_refsource_MISCx_transferred
- 41966 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- MDVSA-2010:213 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- 42008 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- FEDORA-2010-16883 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- SSA:2010-305-01 (opens in a new tab)vendor-advisoryx_refsource_SLACKWAREx_transferred
- ADV-2010-2871 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- http://isc.sans.edu/diary.html?storyid=9817 (opens in a new tab)x_refsource_MISCx_transferred
- RHSA-2010:0810 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- http://www.mozilla.org/security/announce/2010/mfsa2010-73.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- 15352 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- oval:org.mitre.oval:def:12108 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- 42003 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- FEDORA-2010-16897 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- RHSA-2010:0861 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- FEDORA-2010-16885 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- 15342 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- ADV-2010-2864 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2010-3765 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2010-3765)Record last updated .