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CVE-2006-2781

18
FAUCET Score

CVE-2006-2781 describes a double free vulnerability in Mozilla Thunderbird and SeaMonkey, specifically within the nsVCard.cpp component. This flaw allows remote attackers to trigger a denial of service (application hang) and potentially execute arbitrary code by sending a VCard containing invalid base64 characters. With a CVSS score of 6.4, it is considered a medium-severity vulnerability, requiring no authentication and low attack complexity. While no active exploitation, public exploit code, or significant community discussion has been observed, the potential for arbitrary code execution warrants attention.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
<= 1.5.0.3CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.4MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.31%
Probability of exploitation in next 30 days
EPSS Percentile
87.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0331 is in the 83rd percentile among its peer group of 23,723 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, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (8)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: seamonkey-0:1.0.2-0.1.0.EL3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: devhelp-0:0.10-0.2.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: seamonkey-0:1.0.3-0.el4.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: thunderbird-0:1.5.0.5-0.el4.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux AS (Advanced Server) version 2.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux ES version 2.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux WS version 2.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Linux Advanced Workstation 2.1
View patch

Vendor Advisories (1)

redhatCVE-2006-2781Critical

(seamonkey): DOS/arbitrary code execution vuln with vcards

Jun 2, 2006

References

rhn.redhat.com / errata/RHSA-2006-0609.html
secunia.com / advisories/20382
Vendor Advisory
secunia.com / advisories/20394
Vendor Advisory
secunia.com / advisories/20709
Vendor Advisory
secunia.com / advisories/21134
Vendor Advisory
secunia.com / advisories/21178
Vendor Advisory
secunia.com / advisories/21183
Vendor Advisory
secunia.com / advisories/21210
Vendor Advisory
secunia.com / advisories/21269
Vendor Advisory
secunia.com / advisories/21324
Vendor Advisory
secunia.com / advisories/21336
Vendor Advisory
secunia.com / advisories/21607
Vendor Advisory
secunia.com / advisories/21631
Vendor Advisory
secunia.com / advisories/22065
Vendor Advisory
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/26850
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10247
usn.ubuntu.com / 297-1
usn.ubuntu.com / 297-3
usn.ubuntu.com / 323-1
debian.org / security/2006/dsa-1118
debian.org / security/2006/dsa-1134
gentoo.org / security/en/glsa/glsa-200606-21.xml
mandriva.com / security/advisories
mozilla.org / security/announce/2006/mfsa2006-40.html
novell.com / linux/security/advisories/2006_35_mozilla.html
redhat.com / support/errata/RHSA-2006-0578.html
redhat.com / support/errata/RHSA-2006-0594.html
redhat.com / support/errata/RHSA-2006-0611.html
securityfocus.com / archive/1/435795/100/0/threaded
securityfocus.com / archive/1/446657/100/200/threaded
securityfocus.com / bid/18228
vupen.com / english/advisories/2006/2106
vupen.com / english/advisories/2006/3749