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CVE-2009-3981

29
FAUCET Score

CVE-2009-3981 describes an unspecified vulnerability in the browser engine of Mozilla Firefox before version 3.0.16, SeaMonkey before 2.0.1, and Thunderbird. This flaw could allow remote attackers to trigger a denial of service through memory corruption and application crashes, or potentially execute arbitrary code. With a CVSS score of 9.3, it is considered critical due to its network attack vector, medium attack complexity, and complete impact on confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.0.15CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.1:*:*:*:*:*:*:*
0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.2:*:*:*:*:*:*:*
0.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.3:*:*:*:*:*:*:*
0.4CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.4:*:*:*:*:*:*:*

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
3.72%
Probability of exploitation in next 30 days
EPSS Percentile
88.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0372 is in the 49th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 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 (4)

mozillapatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:3.0.16-4.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:3.0.16-1.el5_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:1.9.0.16-2.el5_4
View patch

Vendor Advisories (1)

redhatCVE-2009-3981Critical

Mozilla crashes with evidence of memory corruption

Dec 15, 2009

References

bugzilla.mozilla.org / show_bug.cgi
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/37699
Vendor Advisory
secunia.com / advisories/37704
Vendor Advisory
secunia.com / advisories/37785
Vendor Advisory
secunia.com / advisories/37813
secunia.com / advisories/37881
securitytracker.com / id
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/54801
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8523
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8584
rhn.redhat.com / errata/RHSA-2009-1674.html
debian.org / security/2009/dsa-1956
mozilla.org / security/announce/2009/mfsa2009-65.html
PatchVendor Advisory
novell.com / linux/security/advisories/2009_63_firefox.html
securityfocus.com / bid/37349
securityfocus.com / bid/37363
ubuntu.com / usn/USN-873-1
vupen.com / english/advisories/2009/3547
Vendor Advisory