Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2010-3765

97
FAUCET Score

CVE-2010-3765 is a critical memory corruption vulnerability affecting Mozilla Firefox, Thunderbird, and SeaMonkey versions prior to their respective patches, specifically when JavaScript is enabled. This flaw allows remote attackers to execute arbitrary code by manipulating document frames and the appendChild method, leading to incorrect index tracking. With a CVSS score of 9.8 (CRITICAL), it presents a severe risk of complete compromise (confidentiality, integrity, and availability). The vulnerability has been actively exploited in the wild by the Belmoo malware since October 2010, has a Metasploit module available, and shows significant community discussion, indicating widespread awareness and exploitability.

Impacted Technologies

VendorProductVersion(s)CPE
3.5CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.5:*:*:*:*:*:*:*
3.5.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.5.1:*:*:*:*:*:*:*
3.5.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.5.2:*:*:*:*:*:*:*
3.5.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.5.3:*:*:*:*:*:*:*
3.5.4CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.5.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
83.28%
Probability of exploitation in next 30 days
EPSS Percentile
99.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Added to KEV · Oct 6, 2025
Metasploit: Mozilla Firefox Interleaved document.write/appendChild Memory Corruption · Oct 25, 2010
ExploitDB: EDB-16509 · Feb 22, 2011
This CVE's current EPSS score of 0.8328 is in the 98th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (9)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: seamonkey-0:1.0.9-0.62.el3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:3.6.11-4.el4_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: seamonkey-0:1.0.9-65.el4_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: thunderbird-0:1.5.0.12-33.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:1.9.2.11-4.el5_5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:2.0.0.24-10.el5_5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:3.6.12-1.el6_0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xulrunner-0:1.9.2.12-1.el6_0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:3.1.6-1.el6_0
View patch

Vendor Advisories (1)

redhatCVE-2010-3765Critical

Firefox race condition flaw (MFSA 2010-73)

Oct 28, 2010

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
blog.mozilla.com / security/2010/10/26/critical-vulnerability-in-firefox-3-5-and-firefox-3-6
Vendor Advisory
blogs.sun.com / security/entry/multiple_vulnerabilities_in_mozilla_firefox
Broken Link
isc.sans.edu / diary.html
Press/Media Coverage
lists.fedoraproject.org / pipermail/package-announce/2010-November/050233.html
Third Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2010-October/050061.html
Third Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2010-October/050077.html
Third Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2010-October/050154.html
Third Party Advisory
norman.com / about_norman/press_center/news_archive/2010/129223/en
Product
bugzilla.mozilla.org / show_bug.cgi
Issue Tracking
bugzilla.mozilla.org / show_bug.cgi
Issue Tracking
bugzilla.redhat.com / show_bug.cgi
Issue Tracking
secunia.com / advisories/41761
Vendor Advisory
secunia.com / advisories/41965
Vendor Advisory
secunia.com / advisories/41966
Vendor Advisory
secunia.com / advisories/41969
Vendor Advisory
secunia.com / advisories/41975
Vendor Advisory
secunia.com / advisories/42003
Vendor Advisory
secunia.com / advisories/42008
Vendor Advisory
secunia.com / advisories/42043
Vendor Advisory
secunia.com / advisories/42867
Vendor Advisory
slackware.com / security/viewer.php
Third Party Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12108
Third Party Advisory
rhn.redhat.com / errata/RHSA-2010-0812.html
Third Party Advisory
support.avaya.com / css/P8/documents/100114329
Third Party Advisory
support.avaya.com / css/P8/documents/100114335
Third Party Advisory
debian.org / security/2010/dsa-2124
Third Party Advisory
exploit-db.com / exploits/15341
Exploit
exploit-db.com / exploits/15342
Exploit
exploit-db.com / exploits/15352
Exploit
mandriva.com / security/advisories
Third Party Advisory
mandriva.com / security/advisories
Third Party Advisory
mozilla.org / security/announce/2010/mfsa2010-73.html
Third Party Advisory
norman.com / about_norman/press_center/news_archive/2010/129223
Broken Link
norman.com / security_center/virus_description_archive/129146
Broken Link
redhat.com / support/errata/RHSA-2010-0808.html
Third Party Advisory
redhat.com / support/errata/RHSA-2010-0809.html
Third Party Advisory
redhat.com / support/errata/RHSA-2010-0810.html
Third Party Advisory
redhat.com / support/errata/RHSA-2010-0861.html
Third Party Advisory
redhat.com / support/errata/RHSA-2010-0896.html
Third Party Advisory
securityfocus.com / bid/44425
Broken Link
securitytracker.com / id
Broken Link
securitytracker.com / id
Broken Link
securitytracker.com / id
Broken Link
ubuntu.com / usn/usn-1011-1
Third Party Advisory
ubuntu.com / usn/USN-1011-2
Third Party Advisory
ubuntu.com / usn/USN-1011-3
Third Party Advisory
vupen.com / english/advisories/2010/2837
Vendor Advisory
vupen.com / english/advisories/2010/2857
Vendor Advisory
vupen.com / english/advisories/2010/2864
Vendor Advisory
vupen.com / english/advisories/2010/2871
Vendor Advisory
vupen.com / english/advisories/2011/0061
Vendor Advisory