CVE-2010-3768

Mozilla Firefox before 3.5.16 and 3.6.x before 3.6.13, Thunderbird before 3.0.11 and 3.1.x before 3.1.7, and SeaMonkey before 2.0.11 do not properly validate downloadable fonts before use within an operating system's font implementation, which allows remote attackers to execute arbitrary code via vectors related to @font-face Cascading Style Sheets (CSS) rules.

Published: 2010-12-10 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2010-3768 is rated High Risk (67.7/100): CVSS Critical severity, with high exploitation likelihood (EPSS 4.83%, 91th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2010-3768

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 6.14% 4.83% -1.31%
2 2026-04-12 7.59% 6.14% -1.45%
3 2026-03-16 7.59%

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2010-3768

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
8.6 10.0 [email protected]

Weakness enumeration for CVE-2010-3768

OS Trackers for CVE-2010-3768

vendor priority summary link
gentoo high CVE-2010-3768: 1 GLSA(s) (201301-01), 14 atom(s) (dev-libs/nss, mail-client/mozilla-thunderbird, …); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2010-3768
redhat critical https://access.redhat.com/security/cve/CVE-2010-3768
ubuntu low CVE-2010-3768 low priority: Ubuntu including 5 source packages (firefox, firefox-3.0, firefox-3.5, seamonkey, xulrunner-1.9.2), 30 status rows across 6 suites (dapper, hardy, karmic, lucid, maverick, upstream): released 14, DNE 11, needs-triage 3, ignored 2. https://ubuntu.com/security/CVE-2010-3768

Affected software / configurations for CVE-2010-3768

Vendor Product Version Raw CPE
mozilla firefox 3.6 cpe:2.3:a:mozilla:firefox:3.6:*:*:*:*:*:*:*
mozilla firefox 3.6.2 cpe:2.3:a:mozilla:firefox:3.6.2:*:*:*:*:*:*:*
mozilla firefox 3.6.3 cpe:2.3:a:mozilla:firefox:3.6.3:*:*:*:*:*:*:*
mozilla firefox 3.6.4 cpe:2.3:a:mozilla:firefox:3.6.4:*:*:*:*:*:*:*
mozilla firefox 3.6.6 cpe:2.3:a:mozilla:firefox:3.6.6:*:*:*:*:*:*:*
mozilla firefox 3.6.7 cpe:2.3:a:mozilla:firefox:3.6.7:*:*:*:*:*:*:*
mozilla firefox 3.6.8 cpe:2.3:a:mozilla:firefox:3.6.8:*:*:*:*:*:*:*
mozilla firefox 3.6.9 cpe:2.3:a:mozilla:firefox:3.6.9:*:*:*:*:*:*:*
mozilla firefox 3.6.10 cpe:2.3:a:mozilla:firefox:3.6.10:*:*:*:*:*:*:*
mozilla firefox 3.6.11 cpe:2.3:a:mozilla:firefox:3.6.11:*:*:*:*:*:*:*
mozilla firefox 3.6.12 cpe:2.3:a:mozilla:firefox:3.6.12:*:*:*:*:*:*:*
mozilla seamonkey <= 2.0.10 cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
mozilla seamonkey 1.0 cpe:2.3:a:mozilla:seamonkey:1.0:*:*:*:*:*:*:*
mozilla seamonkey 1.0 cpe:2.3:a:mozilla:seamonkey:1.0:alpha:*:*:*:*:*:*
mozilla seamonkey 1.0 cpe:2.3:a:mozilla:seamonkey:1.0:beta:*:*:*:*:*:*
mozilla seamonkey 1.0.1 cpe:2.3:a:mozilla:seamonkey:1.0.1:*:*:*:*:*:*:*
mozilla seamonkey 1.0.2 cpe:2.3:a:mozilla:seamonkey:1.0.2:*:*:*:*:*:*:*
mozilla seamonkey 1.0.3 cpe:2.3:a:mozilla:seamonkey:1.0.3:*:*:*:*:*:*:*
mozilla seamonkey 1.0.4 cpe:2.3:a:mozilla:seamonkey:1.0.4:*:*:*:*:*:*:*
mozilla seamonkey 1.0.5 cpe:2.3:a:mozilla:seamonkey:1.0.5:*:*:*:*:*:*:*
mozilla seamonkey 1.0.6 cpe:2.3:a:mozilla:seamonkey:1.0.6:*:*:*:*:*:*:*
mozilla seamonkey 1.0.7 cpe:2.3:a:mozilla:seamonkey:1.0.7:*:*:*:*:*:*:*
mozilla seamonkey 1.0.8 cpe:2.3:a:mozilla:seamonkey:1.0.8:*:*:*:*:*:*:*
mozilla seamonkey 1.0.9 cpe:2.3:a:mozilla:seamonkey:1.0.9:*:*:*:*:*:*:*
mozilla seamonkey 1.1 cpe:2.3:a:mozilla:seamonkey:1.1:*:*:*:*:*:*:*
mozilla seamonkey 1.1 cpe:2.3:a:mozilla:seamonkey:1.1:alpha:*:*:*:*:*:*
mozilla seamonkey 1.1 cpe:2.3:a:mozilla:seamonkey:1.1:beta:*:*:*:*:*:*
mozilla seamonkey 1.1.1 cpe:2.3:a:mozilla:seamonkey:1.1.1:*:*:*:*:*:*:*
mozilla seamonkey 1.1.2 cpe:2.3:a:mozilla:seamonkey:1.1.2:*:*:*:*:*:*:*
mozilla seamonkey 1.1.3 cpe:2.3:a:mozilla:seamonkey:1.1.3:*:*:*:*:*:*:*
mozilla seamonkey 1.1.4 cpe:2.3:a:mozilla:seamonkey:1.1.4:*:*:*:*:*:*:*
mozilla seamonkey 1.1.5 cpe:2.3:a:mozilla:seamonkey:1.1.5:*:*:*:*:*:*:*
mozilla seamonkey 1.1.6 cpe:2.3:a:mozilla:seamonkey:1.1.6:*:*:*:*:*:*:*
mozilla seamonkey 1.1.7 cpe:2.3:a:mozilla:seamonkey:1.1.7:*:*:*:*:*:*:*
mozilla seamonkey 1.1.8 cpe:2.3:a:mozilla:seamonkey:1.1.8:*:*:*:*:*:*:*
mozilla seamonkey 1.1.9 cpe:2.3:a:mozilla:seamonkey:1.1.9:*:*:*:*:*:*:*
mozilla seamonkey 1.1.10 cpe:2.3:a:mozilla:seamonkey:1.1.10:*:*:*:*:*:*:*
mozilla seamonkey 1.1.11 cpe:2.3:a:mozilla:seamonkey:1.1.11:*:*:*:*:*:*:*
mozilla seamonkey 1.1.12 cpe:2.3:a:mozilla:seamonkey:1.1.12:*:*:*:*:*:*:*
mozilla seamonkey 1.1.13 cpe:2.3:a:mozilla:seamonkey:1.1.13:*:*:*:*:*:*:*
mozilla seamonkey 1.1.14 cpe:2.3:a:mozilla:seamonkey:1.1.14:*:*:*:*:*:*:*
mozilla seamonkey 1.1.15 cpe:2.3:a:mozilla:seamonkey:1.1.15:*:*:*:*:*:*:*
mozilla seamonkey 1.1.16 cpe:2.3:a:mozilla:seamonkey:1.1.16:*:*:*:*:*:*:*
mozilla seamonkey 1.1.17 cpe:2.3:a:mozilla:seamonkey:1.1.17:*:*:*:*:*:*:*
mozilla seamonkey 1.1.18 cpe:2.3:a:mozilla:seamonkey:1.1.18:*:*:*:*:*:*:*
mozilla seamonkey 1.1.19 cpe:2.3:a:mozilla:seamonkey:1.1.19:*:*:*:*:*:*:*
mozilla seamonkey 1.5.0.8 cpe:2.3:a:mozilla:seamonkey:1.5.0.8:*:*:*:*:*:*:*
mozilla seamonkey 1.5.0.9 cpe:2.3:a:mozilla:seamonkey:1.5.0.9:*:*:*:*:*:*:*
mozilla seamonkey 1.5.0.10 cpe:2.3:a:mozilla:seamonkey:1.5.0.10:*:*:*:*:*:*:*
mozilla seamonkey 2.0 cpe:2.3:a:mozilla:seamonkey:2.0:*:*:*:*:*:*:*
mozilla seamonkey 2.0 cpe:2.3:a:mozilla:seamonkey:2.0:alpha_1:*:*:*:*:*:*
mozilla seamonkey 2.0 cpe:2.3:a:mozilla:seamonkey:2.0:alpha_2:*:*:*:*:*:*
mozilla seamonkey 2.0 cpe:2.3:a:mozilla:seamonkey:2.0:alpha_3:*:*:*:*:*:*
mozilla seamonkey 2.0 cpe:2.3:a:mozilla:seamonkey:2.0:beta_1:*:*:*:*:*:*
mozilla seamonkey 2.0 cpe:2.3:a:mozilla:seamonkey:2.0:beta_2:*:*:*:*:*:*
mozilla seamonkey 2.0 cpe:2.3:a:mozilla:seamonkey:2.0:rc1:*:*:*:*:*:*
mozilla seamonkey 2.0 cpe:2.3:a:mozilla:seamonkey:2.0:rc2:*:*:*:*:*:*
mozilla seamonkey 2.0.1 cpe:2.3:a:mozilla:seamonkey:2.0.1:*:*:*:*:*:*:*
mozilla seamonkey 2.0.2 cpe:2.3:a:mozilla:seamonkey:2.0.2:*:*:*:*:*:*:*
mozilla seamonkey 2.0.3 cpe:2.3:a:mozilla:seamonkey:2.0.3:*:*:*:*:*:*:*
mozilla seamonkey 2.0.4 cpe:2.3:a:mozilla:seamonkey:2.0.4:*:*:*:*:*:*:*
mozilla seamonkey 2.0.5 cpe:2.3:a:mozilla:seamonkey:2.0.5:*:*:*:*:*:*:*
mozilla seamonkey 2.0.6 cpe:2.3:a:mozilla:seamonkey:2.0.6:*:*:*:*:*:*:*
mozilla seamonkey 2.0.7 cpe:2.3:a:mozilla:seamonkey:2.0.7:*:*:*:*:*:*:*
mozilla seamonkey 2.0.8 cpe:2.3:a:mozilla:seamonkey:2.0.8:*:*:*:*:*:*:*
mozilla seamonkey 2.0.9 cpe:2.3:a:mozilla:seamonkey:2.0.9:*:*:*:*:*:*:*
mozilla firefox <= 3.5.15 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozilla firefox 1.0 cpe:2.3:a:mozilla:firefox:1.0:*:*:*:*:*:*:*
mozilla firefox 1.0 cpe:2.3:a:mozilla:firefox:1.0:preview_release:*:*:*:*:*:*
mozilla firefox 1.0.1 cpe:2.3:a:mozilla:firefox:1.0.1:*:*:*:*:*:*:*
mozilla firefox 1.0.2 cpe:2.3:a:mozilla:firefox:1.0.2:*:*:*:*:*:*:*
mozilla firefox 1.0.3 cpe:2.3:a:mozilla:firefox:1.0.3:*:*:*:*:*:*:*
mozilla firefox 1.0.4 cpe:2.3:a:mozilla:firefox:1.0.4:*:*:*:*:*:*:*
mozilla firefox 1.0.5 cpe:2.3:a:mozilla:firefox:1.0.5:*:*:*:*:*:*:*
mozilla firefox 1.0.6 cpe:2.3:a:mozilla:firefox:1.0.6:*:*:*:*:*:*:*
mozilla firefox 1.0.7 cpe:2.3:a:mozilla:firefox:1.0.7:*:*:*:*:*:*:*
mozilla firefox 1.0.8 cpe:2.3:a:mozilla:firefox:1.0.8:*:*:*:*:*:*:*
mozilla firefox 1.5 cpe:2.3:a:mozilla:firefox:1.5:*:*:*:*:*:*:*
mozilla firefox 1.5 cpe:2.3:a:mozilla:firefox:1.5:beta1:*:*:*:*:*:*
mozilla firefox 1.5 cpe:2.3:a:mozilla:firefox:1.5:beta2:*:*:*:*:*:*

References for CVE-2010-3768

URL Tags
http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052022.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052032.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052110.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052220.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052502.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052504.html
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00002.html
http://secunia.com/advisories/42716
http://secunia.com/advisories/42818
http://support.avaya.com/css/P8/documents/100124650
http://www.mandriva.com/security/advisories?name=MDVSA-2010:251
http://www.mandriva.com/security/advisories?name=MDVSA-2010:258
http://www.mozilla.org/security/announce/2010/mfsa2010-78.html Vendor Advisory
http://www.redhat.com/support/errata/RHSA-2010-0966.html
http://www.redhat.com/support/errata/RHSA-2010-0969.html
http://www.securityfocus.com/bid/45352
http://www.securitytracker.com/id?1024846
http://www.securitytracker.com/id?1024848
http://www.ubuntu.com/usn/USN-1019-1
http://www.ubuntu.com/usn/USN-1020-1
http://www.vupen.com/english/advisories/2011/0030
https://bugzilla.mozilla.org/show_bug.cgi?id=527276 Patch
https://bugzilla.redhat.com/show_bug.cgi?id=660420
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12533
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