CVE-2005-1521

Integer overflow in the fetch_io function of the imap4d server in GNU Mailutils 0.5 and 0.6, and other versions before 0.6.90, allows remote attackers to execute arbitrary code via a partial message request with a large value in the END parameter, which leads to a heap-based buffer overflow.

Published: 2005-05-26 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2005-1521 is rated Moderate Risk (59.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.26%). 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-2005-1521

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 2026-06-15 4.10% 3.26% -0.84%
2 2025-03-30 4.59% 4.10% -0.48%
3 2025-03-29 — 4.59% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2005-1521

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P 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:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2005-1521

OS Trackers for CVE-2005-1521

vendor priority summary link
debian not yet assigned CVE-2005-1521 not yet assigned priority: Debian including 1 source packages (mailutils), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2005-1521
ubuntu medium CVE-2005-1521 medium priority: Ubuntu including 1 source packages (mailutils), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): not-affected 3, needs-triage 1. https://ubuntu.com/security/CVE-2005-1521

Affected software / configurations for CVE-2005-1521

Vendor Product Version Raw CPE
gnu mailutils 0.5 cpe:2.3:a:gnu:mailutils:0.5:*:*:*:*:*:*:*
gnu mailutils 0.6 cpe:2.3:a:gnu:mailutils:0.6:*:*:*:*:*:*:*

References for CVE-2005-1521

cvelogic Threat Intelligence