CVE-2006-5877

The enigmail extension before 0.94.2 does not properly handle large, encrypted file e-mail attachments, which allows remote attackers to cause a denial of service (crash), as demonstrated with Mozilla Thunderbird.

Published: 2007-02-23 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-5877 is rated Moderate Risk (57/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.80%). Review affected assets and schedule 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-2006-5877

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 2025-10-12 0.66% 0.80% +0.14%
2 2025-03-30 0.55% 0.66% +0.11%
3 2025-03-29 — 0.55% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-5877

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2006-5877

OS Trackers for CVE-2006-5877

vendor priority summary link
debian not yet assigned CVE-2006-5877 not yet assigned priority: Debian including 1 source packages (enigmail), 1 status rows across 1 suites (bullseye): resolved 1. https://security-tracker.debian.org/tracker/CVE-2006-5877
ubuntu medium CVE-2006-5877 medium priority: Ubuntu including 1 source packages (enigmail), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. https://ubuntu.com/security/CVE-2006-5877

Affected software / configurations for CVE-2006-5877

Vendor Product Version Raw CPE
enigmail enigmail <= 0.92.0 cpe:2.3:a:enigmail:enigmail:*:*:*:*:*:*:*:*

References for CVE-2006-5877

cvelogic Threat Intelligence