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Fencer Vulns
critical 9.1

CVE-2021-32055 json

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 ou…

published 2021-05-05 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-18918

cvss
9.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

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.

Patch / fix

  • mutt mutt 2.0.7
  • mutt Debian 14, Debian 13, Debian 12 2.0.5-4.1
  • neomutt Debian 14, Debian 13, Debian 12 20201127+dfsg.1-1.2

debian advisories DEBIAN-CVE-2021-32055

  • mutt Ubuntu 20.04 LTS 1.13.2-1ubuntu0.5
  • mutt Ubuntu Pro 16.04 LTS 1.5.24-1ubuntu0.6+esm2
  • neomutt Ubuntu Pro 20.04 LTS 20191207+dfsg.1-1.1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2021-32055

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • mutt openSUSE Tumbleweed 2.0.7-2.2
  • neomutt openSUSE Tumbleweed 20211029-1.1
  • neomutt Package Hub 15 SP4, openSUSE Leap 15.4 20220429-bp154.2.3.1

opensuse advisories openSUSE-SU-2024:11069-1openSUSE-SU-2024:11719-1openSUSE-SU-2022:10020-1

  • neomutt Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 20211015-r0

alpine advisories ALPINE-CVE-2021-32055

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • mutt CBL-Mariner 2.0 2.0.5-4

azure linux advisories AZL-7292

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • mutt Arch Linux 2.0.7-1
  • neomutt Arch Linux 20211015-1

arch linux advisories AVG-1922AVG-1923

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-32055 updated cvss 9.1

neomutt: Out of bounds read in IMAP parser

  • Red Hat Enterprise Linux 6 mutt Red Hat Enterprise Linux 7 mutt Red Hat Enterprise Linux 8 mutt Red Hat Enterprise Linux 9 mutt
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.55% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.