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CVE-2009-2466

27
FAUCET Score

CVE-2009-2466 describes a critical memory corruption vulnerability in the JavaScript engine of Mozilla Firefox before version 3.0.12 and Thunderbird. This flaw allows remote attackers to trigger a denial of service (application crash) or potentially execute arbitrary code. With a CVSS score of 10.0, this vulnerability is highly severe, requiring no authentication or complex attack vectors, and can lead to complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.0.12CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
<= 3.0.11CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

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

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

Exploit Intelligence

EPSS Score
6.62%
Probability of exploitation in next 30 days
EPSS Percentile
93.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0662 is in the 88th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

mozillapatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: seamonkey-0:1.0.9-0.40.el3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:3.0.12-1.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: seamonkey-0:1.0.9-45.el4_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: thunderbird-0:1.5.0.12-25.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:3.0.12-1.el5_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:1.9.0.12-1.el5_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:2.0.0.24-2.el5_4
View patch

Vendor Advisories (1)

redhatCVE-2009-2466Critical

Mozilla JavaScript engine crashes

Jul 21, 2009

References

lists.opensuse.org / opensuse-security-announce/2009-07/msg00005.html
Broken Link
lists.opensuse.org / opensuse-security-announce/2009-08/msg00002.html
Broken Link
rhn.redhat.com / errata/RHSA-2009-1162.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2009-1163.html
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
ExploitIssue TrackingVendor Advisory
bugzilla.mozilla.org / show_bug.cgi
Broken LinkExploit
bugzilla.mozilla.org / show_bug.cgi
Issue TrackingPatchVendor Advisory
bugzilla.mozilla.org / show_bug.cgi
Issue TrackingVendor Advisory
secunia.com / advisories/35914
Not ApplicableVendor Advisory
secunia.com / advisories/35943
Not ApplicableVendor Advisory
secunia.com / advisories/35944
Not ApplicablePatchVendor Advisory
secunia.com / advisories/35947
Not ApplicableVendor Advisory
secunia.com / advisories/36005
Not Applicable
secunia.com / advisories/36145
Not Applicable
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9820
Broken Link
sunsolve.sun.com / search/document.do
Broken Link
sunsolve.sun.com / search/document.do
Broken Link
redhat.com / archives/fedora-package-announce/2009-July/msg01032.html
Broken Link
mozilla.org / security/announce/2009/mfsa2009-34.html
Vendor Advisory
redhat.com / support/errata/RHSA-2010-0153.html
Third Party Advisory
redhat.com / support/errata/RHSA-2010-0154.html
Third Party Advisory
securityfocus.com / bid/35758
Broken LinkPatch
vupen.com / english/advisories/2009/1972
Broken LinkVendor Advisory
vupen.com / english/advisories/2009/2152
Broken Link
vupen.com / english/advisories/2010/0650
Broken Link