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CVE-2005-1521

20
FAUCET Score

CVE-2005-1521 describes an integer overflow vulnerability in the fetch_io function of the imap4d server within GNU Mailutils versions 0.5, 0.6, and earlier than 0.6.90. This flaw allows unauthenticated remote attackers to execute arbitrary code by sending a crafted partial message request with a large END parameter, leading to a heap-based buffer overflow. With a CVSS score of 7.5, this vulnerability is considered highly severe due to its network-based attack vector, low attack complexity, and potential for complete compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
0.5CPE matchmatch criteria
cpe:2.3:a:gnu:mailutils:0.5:*:*:*:*:*:*:*
0.6CPE matchmatch criteria
cpe:2.3:a:gnu:mailutils:0.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.26%
Probability of exploitation in next 30 days
EPSS Percentile
87.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0326 is in the 77th percentile among its peer group of 51,485 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

Remediation records are not available for this CVE.

References

secunia.com / advisories/15442
Vendor Advisory
securitytracker.com / id
debian.org / security/2005/dsa-732
idefense.com / application/poi/display
Patch
securityfocus.com / bid/13763
Patch