CVE-2020-14093

MEDIUMNVD 5.95.9—

5.9

Mutt before 1.14.3 allows an IMAP fcc/postpone man-in-the-middle attack via a PREAUTH response.

CVSS v3: 5.9
EG Score: 5.9(medium)
EPSS: 88.4%
KEV: Not listed

Published

June 15, 2020

Last Modified

November 21, 2024

References (22)

cve@mitrehttp://lists.opensuse.org/opensuse-security-announce/2020-06/msg00064.html
cve@mitrehttp://lists.opensuse.org/opensuse-security-announce/2020-06/msg00070.html
cve@mitrehttp://www.mutt.org
cve@mitrehttps://bugs.gentoo.org/728300
cve@mitrehttps://github.com/muttmua/mutt/commit/3e88866dc60b5fa6aaba6fd7c1710c12c1c3cd01
cve@mitrehttps://lists.debian.org/debian-lts-announce/2020/06/msg00039.html
cve@mitrehttps://lists.debian.org/debian-lts-announce/2020/06/msg00040.html
cve@mitrehttps://security.gentoo.org/glsa/202007-57
cve@mitrehttps://usn.ubuntu.com/4401-1/
cve@mitrehttps://www.debian.org/security/2020/dsa-4707
cve@mitrehttps://www.debian.org/security/2020/dsa-4708
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00064.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00070.html
af854a3a-2127-422b-91ae-364da2661108http://www.mutt.org
af854a3a-2127-422b-91ae-364da2661108https://bugs.gentoo.org/728300

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	mutt-patched (1.5.21-5ubuntu2.4) @ precise	2026-05-27	ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

UbuntuUSN-4401-1MEDIUM
Mutt vulnerabilities

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 02:30 UTCEG score recompute
2026-05-27 02:30 UTCVendor advisory
2026-05-27 02:30 UTCGHSA enrichment
2026-05-26 20:44 UTCOSV refresh
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2020-14093?

CVE-2020-14093 is a medium vulnerability published on June 15, 2020. Mutt before 1.14.3 allows an IMAP fcc/postpone man-in-the-middle attack via a PREAUTH response.

When was CVE-2020-14093 disclosed?

CVE-2020-14093 was first published in the National Vulnerability Database on June 15, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-14093 actively exploited?

CVE-2020-14093 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 88.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-14093?

CVE-2020-14093 has a CVSS v3 base score of 5.9 (NVD).

How do I remediate CVE-2020-14093?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-14093, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2020-14093

Published

Last Modified

References (22)

Patch Availability(1)

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-14093?

Same vendor

Same CWE

CVE-2020-14093

📅 Published

🔄 Last Modified

🔗 References (22)

Patch Availability(1)

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-14093?

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References (22)

Frequently asked(5)

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