How severe is CVE-2005-1521?

CVE-2005-1521 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2005-1521 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-1521?

CVE-2005-1521 primarily affects Gnu Mailutils. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2005-1521?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2005-1521 published?

CVE-2005-1521 was published on 2005-05-26 and last updated on 2026-06-16.

CVE-2005-1521

CVE-2005-1521 is a high-severity vulnerability in Gnu Mailutils with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Gnu Mailutils
Published: 2005-05-26
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2005-1521?: CVE-2005-1521 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2005-1521 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-1521?: CVE-2005-1521 primarily affects Gnu Mailutils. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-1521?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2005-1521 published?: CVE-2005-1521 was published on 2005-05-26 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:gnu:mailutils:0.5:*:*:*:*:*:*:*
cpe:2.3:a:gnu:mailutils:0.6:*:*:*:*:*:*:*

More vulnerabilities in Gnu Mailutils

CVE-2019-18862 — High (CVSS 7.8): maidag in GNU Mailutils before 3.8 is installed setuid and allows local privilege escalation in the url mode.
CVE-2005-2878 — High (CVSS 7.5): Format string vulnerability in search.c in the imap4d server in GNU Mailutils 0.6 allows remote authenticated users to…
CVE-2005-1824 — High (CVSS 7.5): The sql_escape_string function in auth/sql.c for the mailutils SQL authentication module does not properly quote the…
CVE-2005-1520 — High (CVSS 7.5): Buffer overflow in the header_get_field_name function in header.c for GNU Mailutils 0.5 and 0.6, and other versions…
CVE-2005-1523 — High (CVSS 7.5): Format string vulnerability in imap4d server in GNU Mailutils 0.5 and 0.6, and other versions before 0.6.90, allows…
CVE-2004-0984 — High (CVSS 7.2): Unknown vulnerability in the dotlock implementation in mailutils before 1:0.5-4 on Debian GNU/Linux allows attackers to…

All CVEs affecting Gnu Mailutils →