CVE-2021-32055

Name: CVE-2021-32055
Creator: NVD / NIST
Published: 2021-05-05T16:15:08.117+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 2.55%

Last modified Jun 17, 2026

CVE-2021-32055 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. Mutt 1.11.0 through 2.0.x before 2.0.7 (and NeoMutt 2019-10-25 through 2021-05-04) has a $imap_qresync issue in which imap/util.c has an out-of-bounds read in situations where an IMAP sequence set ends with a comma. NOTE: the $imap_qresync setting for QRESYNC is not enabled by default.. EPSS estimates a 2.55% chance of exploitation in the next 30 days.

Description

Mutt 1.11.0 through 2.0.x before 2.0.7 (and NeoMutt 2019-10-25 through 2021-05-04) has a $imap_qresync issue in which imap/util.c has an out-of-bounds read in situations where an IMAP sequence set ends with a comma. NOTE: the $imap_qresync setting for QRESYNC is not enabled by default.

Metrics

CVSS 3.1

9.1/10

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

EPSS Probability

2.55%

83.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Mutt	Mutt	>= 1.11.0, < 2.0.7
Neomutt	Neomutt	>= 20191025, <= 20210504

References

http://lists.mutt.org/pipermail/mutt-announce/Week-of-Mon-20210503/000036.htmlMailing List, Vendor Advisory
https://github.com/neomutt/neomutt/commit/fa1db5785e5cfd9d3cd27b7571b9fe268d2ec2dcPatch, Third Party Advisory
https://gitlab.com/muttmua/mutt/-/commit/7c4779ac24d2fb68a2a47b58c7904118f40965d5Patch, Third Party Advisory
https://security.gentoo.org/glsa/202105-05Third Party Advisory
http://lists.mutt.org/pipermail/mutt-announce/Week-of-Mon-20210503/000036.htmlMailing List, Vendor Advisory
https://github.com/neomutt/neomutt/commit/fa1db5785e5cfd9d3cd27b7571b9fe268d2ec2dcPatch, Third Party Advisory
https://gitlab.com/muttmua/mutt/-/commit/7c4779ac24d2fb68a2a47b58c7904118f40965d5Patch, Third Party Advisory
https://security.gentoo.org/glsa/202105-05Third Party Advisory

Timeline

Published: May 5, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32055?

How severe is CVE-2021-32055?

CVE-2021-32055 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 2.55% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32055?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-32055?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST