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Vulnerability record · CVE-2021-39272 · published 30 August 2021

CVE-2021-39272: Fetchmail cleartext transmission vulnerability

Fetchmail · Fetchmail

Fetchmail before 6.4.22 fails to enforce STARTTLS session encryption in some circumstances, such as a certain situation with IMAP and PREAUTH.

5.9 CVSS 3.1 Medium EPSS 0.92% · top 41.1% CWE-319 · Cleartext transmission
5.9CVSS 3.1 base score, v2 4.3
0.92%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

Description

Fetchmail before 6.4.22 fails to enforce STARTTLS session encryption in some circumstances, such as a certain situation with IMAP and PREAUTH.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2021/08/27/3 Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3XJ6XLEJCEZCAM5LGGD6XB
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VXMKSEHAQSEDCWZMAOJEGX3
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZYCYLL73NP7ALJWSDICIVSA
https://nostarttls.secvuln.info/ Third Party Advisory
https://security.gentoo.org/glsa/202209-14 Third Party Advisory
https://www.fetchmail.info/security.html Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/08/27/3 Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3XJ6XLEJCEZCAM5LGGD6XB
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VXMKSEHAQSEDCWZMAOJEGX3
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZYCYLL73NP7ALJWSDICIVSA
https://nostarttls.secvuln.info/ Third Party Advisory
https://security.gentoo.org/glsa/202209-14 Third Party Advisory
https://www.fetchmail.info/security.html Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-39272), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.