CVE-2001-0819

CVE-2001-0819 is a high-severity vulnerability in Fetchmail 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. The underlying weakness is classified as CWE-119.

Key facts

• Severity: High (CVSS 2.0 base score 7.5)
• EPSS exploit prediction: 6% (93rd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Fetchmail
• Published: 2001-12-06
• Last modified: 2026-06-16

Description

A buffer overflow in Linux fetchmail before 5.8.6 allows remote attackers to execute arbitrary code via a large 'To:' field in an email header.

Frequently asked questions

What is CVE-2001-0819?

A buffer overflow in Linux fetchmail before 5.8.6 allows remote attackers to execute arbitrary code via a large 'To:' field in an email header.

How severe is CVE-2001-0819?

CVE-2001-0819 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2001-0819 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0819?

CVE-2001-0819 primarily affects Fetchmail. In total, 66 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2001-0819?

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-2001-0819 published?

CVE-2001-0819 was published on 2001-12-06 and last updated on 2026-06-16.

References

• ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:43.fetchmail.asc
• http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000403
• http://download.immunix.org/ImmunixOS/7.0/updates/IMNX-2001-70-025-01
• http://www.caldera.com/support/security/advisories/CSSA-2001-022.1.txt
• http://www.debian.org/security/2001/dsa-060
• http://www.linux-mandrake.com/en/security/2001/MDKSA-2001-063.php3?dis=7.1
• http://www.linuxsecurity.com/advisories/other_advisory-1451.html
• http://www.novell.com/linux/security/advisories/2001_026_fetchmail_txt.html
• http://www.redhat.com/support/errata/RHSA-2001-103.html
• http://www.securityfocus.com/bid/2877
• https://exchange.xforce.ibmcloud.com/vulnerabilities/6704

Affected products (66)

• cpe:2.3:a:fetchmail:fetchmail:*:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.5.1:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.5.2:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.5.3:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.5.4:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.5.5:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.5.6:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.5.7:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.5.8:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.6.1:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.6.2:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.6.3:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.6.4:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.6.5:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.6.6:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.6.7:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.6.8:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.6.9:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.7.0:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.7.1:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.7.2:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.7.3:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.7.4:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.7.5:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.7.6:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:4.7.7:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:5.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:5.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:5.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:5.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:5.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:5.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:5.0.6:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:5.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:5.0.8:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:5.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:5.1.4:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:5.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:fetchmail:fetchmail:5.2.1:*:*:*:*:*:*:*

More vulnerabilities in Fetchmail

• CVE-2001-1009 — Critical (CVSS 10.0): Fetchmail (aka fetchmail-ssl) before 5.8.17 allows a remote malicious (1) IMAP server or (2) POP/POP3 server to…
• CVE-2001-0101 — Critical (CVSS 10.0): Vulnerability in fetchmail 5.5.0-2 and earlier in the AUTHENTICATE GSSAPI command.
• CVE-2006-5974 — High (CVSS 7.8): fetchmail 6.3.5 and 6.3.6 before 6.3.6-rc4, when refusing a message delivered via the mda option, allows remote…
• CVE-2006-5867 — High (CVSS 7.8): fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords over unsecured links if…
• CVE-2005-4348 — High (CVSS 7.8): fetchmail before 6.3.1 and before 6.2.5.5, when configured for multidrop mode, allows remote attackers to cause a…
• CVE-2021-36386 — High (CVSS 7.5): report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf va_list argument,…

All CVEs affecting Fetchmail →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

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• CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
• CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
• CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
• CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →