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CVE-2006-5877

20
FAUCET Score

CVE-2006-5877 describes a denial-of-service vulnerability in the Enigmail extension (versions prior to 0.94.2) for email clients like Mozilla Thunderbird, affecting various Ubuntu distributions. This flaw allows remote attackers to crash the application by sending large, encrypted email attachments. With a CVSS score of 7.8, it is considered high severity, requiring no authentication and having a low attack complexity, leading to a complete loss of availability. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.92.0CPE matchmatch criteria
cpe:2.3:a:enigmail:enigmail:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.65%
Probability of exploitation in next 30 days
EPSS Percentile
74.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0165 is in the 56th percentile among its peer group of 51,455 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 (1)

ubuntupatch availablevia nvd_reference
View patch

References

bugzilla.mozdev.org / show_bug.cgi
enigmail.mozdev.org / changelog.html
securityfocus.com / bid/22684
ubuntu.com / usn/usn-427-1
Patch