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CVE-2006-5867

fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords...

7.8 HighFix available

CVE-2006-5867 is a high vulnerability (CVSS 7.8) in Fetchmail, published December 31, 2006. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.50%, the 91st percentile. Fixed in fetchmail 6.3.6-1.

fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords over unsecured links if certain circumstances occur, which allows remote attackers to obtain sensitive information via man-in-the-middle (MITM) attacks.

Exploit likelihood

4.50%Up 0.1 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 7.8

fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords over unsecured links if certain circumstances occur, which allows remote attackers to obtain sensitive information via man-in-the-middle (MITM) attacks.

Record
CVE-2006-5867
CVSS 2.0
7.8 HighAV:N/AC:L/Au:N/C:C/I:N/A:N
Weakness
CWE-20
Updated
2026-11-02
CVE List No score

fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords over unsecured links if certain circumstances occur, which allows remote attackers to obtain sensitive information via man-in-the-middle (MITM) attacks.

Record
CVE-2006-5867
Updated
2026-11-02
EUVDEUVD-2006-5851 No score

fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords over unsecured links if certain circumstances occur, which allows remote attackers to obtain sensitive information via man-in-the-middle (MITM) attacks.

Record
EUVD-2006-5851
Updated
2026-11-03
GitHub AdvisoriesGHSA-cq85-qr6h-4x5p No score

fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords...

fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords over unsecured links if certain circumstances occur, which allows remote attackers to obtain sensitive information via man-in-the-middle (MITM) attacks.

Record
GHSA-cq85-qr6h-4x5p
Weakness
CWE-20
Updated
2026-11-02
OSV No score

fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords over unsecured links if certain circumstances occur, which allows remote attackers to obtain sensitive information via man-in-the-middle (MITM) attacks.

Record
CVE-2006-5867
Updated
2026-11-02
OSVDEBIAN-CVE-2006-5867 No score

fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords over unsecured links if certain circumstances occur, which allows remote attackers to obtain sensitive information via man-in-the-middle (MITM) attacks.

Record
DEBIAN-CVE-2006-5867
Updated
2026-11-02
OSVopenSUSE-SU-2024:10753-1 No score

fetchmail-6.4.21-2.1 on GA media

These are all security issues fixed in the fetchmail-6.4.21-2.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10753-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
fetchmail
Debian:12
 before 6.3.6-1
6.3.6-1
fetchmail
Debian:13
 before 6.3.6-1
6.3.6-1
fetchmail
Debian:14
 before 6.3.6-1
6.3.6-1
fetchmail
Debian:3.1
 before 6.2.5-12sarge5, plus listed versions
6.2.5-126.2.5-12sarge16.2.5-12sarge26.2.5-12sarge36.2.5-12sarge4
6.2.5-12sarge5
fetchmail
Red Hat:enterprise_linux:2.1::as
 before 0:5.9.0-21.7.3.el2.1.4
0:5.9.0-21.7.3.el2.1.4
fetchmailconf
Red Hat:enterprise_linux:2.1::as
 before 0:5.9.0-21.7.3.el2.1.4
0:5.9.0-21.7.3.el2.1.4
fetchmail
Red Hat:enterprise_linux:2.1::aw
 before 0:5.9.0-21.7.3.el2.1.4
0:5.9.0-21.7.3.el2.1.4
fetchmailconf
Red Hat:enterprise_linux:2.1::aw
 before 0:5.9.0-21.7.3.el2.1.4
0:5.9.0-21.7.3.el2.1.4
fetchmail
Red Hat:enterprise_linux:2.1::es
 before 0:5.9.0-21.7.3.el2.1.4
0:5.9.0-21.7.3.el2.1.4
fetchmailconf
Red Hat:enterprise_linux:2.1::es
 before 0:5.9.0-21.7.3.el2.1.4
0:5.9.0-21.7.3.el2.1.4
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Affected packages
PackageAffectedFixed
fetchmail
Red Hat:enterprise_linux:2.1::ws
 before 0:5.9.0-21.7.3.el2.1.4
0:5.9.0-21.7.3.el2.1.4
fetchmailconf
Red Hat:enterprise_linux:2.1::ws
 before 0:5.9.0-21.7.3.el2.1.4
0:5.9.0-21.7.3.el2.1.4
fetchmail
Red Hat:enterprise_linux:3::as
 before 0:6.2.0-3.el3.3
0:6.2.0-3.el3.3
fetchmail-debuginfo
Red Hat:enterprise_linux:3::as
 before 0:6.2.0-3.el3.3
0:6.2.0-3.el3.3
fetchmail
Red Hat:enterprise_linux:3::desktop
 before 0:6.2.0-3.el3.3
0:6.2.0-3.el3.3
fetchmail-debuginfo
Red Hat:enterprise_linux:3::desktop
 before 0:6.2.0-3.el3.3
0:6.2.0-3.el3.3
fetchmail
Red Hat:enterprise_linux:3::es
 before 0:6.2.0-3.el3.3
0:6.2.0-3.el3.3
fetchmail-debuginfo
Red Hat:enterprise_linux:3::es
 before 0:6.2.0-3.el3.3
0:6.2.0-3.el3.3
fetchmail
Red Hat:enterprise_linux:3::ws
 before 0:6.2.0-3.el3.3
0:6.2.0-3.el3.3
fetchmail-debuginfo
Red Hat:enterprise_linux:3::ws
 before 0:6.2.0-3.el3.3
0:6.2.0-3.el3.3
fetchmail
Red Hat:enterprise_linux:4::as
 before 0:6.2.5-6.el4.5
0:6.2.5-6.el4.5
fetchmail-debuginfo
Red Hat:enterprise_linux:4::as
 before 0:6.2.5-6.el4.5
0:6.2.5-6.el4.5
fetchmail
Red Hat:enterprise_linux:4::desktop
 before 0:6.2.5-6.el4.5
0:6.2.5-6.el4.5
fetchmail-debuginfo
Red Hat:enterprise_linux:4::desktop
 before 0:6.2.5-6.el4.5
0:6.2.5-6.el4.5
fetchmail
Red Hat:enterprise_linux:4::es
 before 0:6.2.5-6.el4.5
0:6.2.5-6.el4.5
fetchmail-debuginfo
Red Hat:enterprise_linux:4::es
 before 0:6.2.5-6.el4.5
0:6.2.5-6.el4.5
fetchmail
Red Hat:enterprise_linux:4::ws
 before 0:6.2.5-6.el4.5
0:6.2.5-6.el4.5
fetchmail-debuginfo
Red Hat:enterprise_linux:4::ws
 before 0:6.2.5-6.el4.5
0:6.2.5-6.el4.5
fetchmail
openSUSE:Tumbleweed
 before 6.4.21-2.1
6.4.21-2.1

History

History
WhenChangedSources
2026-11-03aliasesEUVD
2026-11-02createdCVE List, GitHub Advisories, NVD, OSV

References

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