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Fencer Vulns
high 7.5

CVE-2025-59032 json

ManageSieve AUTHENTICATE command crashes when using literal as SASL initial response.

published 2026-03-27 7 mo ago modified 2026-10-07 33 d ago also EUVD-2025-209092

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits
0
none known

Summary

ManageSieve AUTHENTICATE command crashes when using literal as SASL initial response. This can be used to crash ManageSieve service repeatedly, making it unavailable for other users. Control access to ManageSieve port, or disable the service if it's not needed. Alternatively upgrade to a fixed version. No publicly available exploits are known.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 1:2.3.21-16.el10_1.1, 1:2.3.21-19.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 1:2.3.21-16.el10_0.1
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 1:2.2.36-8.el7_9.1
  • Red Hat Red Hat Enterprise Linux 8 1:2.3.16-7.el8_10
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 1:2.3.8-9.el8_4.1
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 1:2.3.8-9.el8_4.1
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 1:2.3.16-2.el8_6.1
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 1:2.3.16-2.el8_6.1
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 1:2.3.16-2.el8_6.1
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 1:2.3.16-3.el8_8.1
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 1:2.3.16-3.el8_8.1
  • Red Hat Red Hat Enterprise Linux 9 1:2.3.16-15.el9_7.1, 1:2.3.16-18.el9_8
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 1:2.3.16-3.el9_0.1
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 1:2.3.16-8.el9_2.2
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 1:2.3.16-11.el9_4.2
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 1:2.3.16-15.el9_6.1
  • dovecot Debian 12 1:2.3.19.1+dfsg1-2.1+deb12u2
  • dovecot Debian 13 1:2.4.1+dfsg1-6+deb13u4
  • dovecot Debian 14 1:2.4.3+dfsg1-1

debian advisories DEBIAN-CVE-2025-59032

  • dovecot Ubuntu 22.04 LTS 1:2.3.16+dfsg1-3ubuntu2.7
  • dovecot Ubuntu 24.04 LTS 1:2.3.21+dfsg1-2ubuntu6.3
  • dovecot Ubuntu 25.10 1:2.4.1+dfsg1-5ubuntu4.1

ubuntu advisories UBUNTU-CVE-2025-59032

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

  • dovecot RHEL 9 1:2.3.16-18.el9_8
  • dovecot-mysql RHEL 9 1:2.3.16-18.el9_8
  • dovecot-pgsql RHEL 9 1:2.3.16-18.el9_8
  • dovecot-pigeonhole RHEL 9 1:2.3.16-18.el9_8
  • dovecot RHEL 10.2 1:2.3.21-19.el10_2
  • dovecot-mysql RHEL 10.2 1:2.3.21-19.el10_2
  • dovecot-pgsql RHEL 10.2 1:2.3.21-19.el10_2
  • dovecot-pigeonhole RHEL 10.2 1:2.3.21-19.el10_2

red hat advisories RHSA-2026:26564RHSA-2026:19455RHSA-2026:19453RHSA-2026:19364RHSA-2026:19149RHSA-2026:18053

  • dovecot23 SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 2.3.21.1-150200.76.1
  • dovecot24 SLES for SAP applications 16.0, SLES 16.0 2.4.3-160000.1.1

suse advisories SUSE-SU-2026:4139-1SUSE-SU-2026:21208-1

  • dovecot24 openSUSE Leap 16.0 2.4.3-160000.1.1
  • dovecot24 openSUSE Tumbleweed 2.4.3-1.1

opensuse advisories openSUSE-SU-2026:20554-1openSUSE-SU-2026:10442-1

  • dovecot AlmaLinux 10 1:2.3.21-19.el10_2
  • dovecot-mysql AlmaLinux 10 1:2.3.21-19.el10_2
  • dovecot-pgsql AlmaLinux 10 1:2.3.21-19.el10_2
  • dovecot-pigeonhole AlmaLinux 10 1:2.3.21-19.el10_2
  • dovecot AlmaLinux 9 1:2.3.16-18.el9_8
  • dovecot-mysql AlmaLinux 9 1:2.3.16-18.el9_8
  • dovecot-pgsql AlmaLinux 9 1:2.3.16-18.el9_8
  • dovecot-pigeonhole AlmaLinux 9 1:2.3.16-18.el9_8

almalinux advisories ALSA-2026:19149ALSA-2026:19364ALSA-2026:13830ALSA-2026:13857ALSA-2026:13498

  • dovecot Rocky Linux 10 1:2.3.21-19.el10_2
  • dovecot Rocky Linux 9 1:2.3.16-18.el9_8
  • dovecot Rocky Linux 9 1:2.3.16-15.el9_7.1
  • dovecot Rocky Linux 8 1:2.3.16-7.el8_10
  • dovecot Rocky Linux 10 1:2.3.21-16.el10_1.1

rocky linux advisories RLSA-2026:19149RLSA-2026:19364RLSA-2026:13857RLSA-2026:13830RLSA-2026:13498

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-2025-59032 updated cvss 7.5

dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command

  • Red Hat Enterprise Linux 6 dovecot, dovecot-mysql, dovecot-pgsql, dovecot-pigeonhole
    affected: no fix planned “Will not fix”
  • Red Hat CodeReady Linux Builder EUS (v.9.4) dovecot 2.3.16-11.el9_4.2
    fixed: vendor fix RHSA-2026:17625
  • Red Hat CodeReady Linux Builder EUS (v.9.6) dovecot 2.3.16-15.el9_6.1
    fixed: vendor fix RHSA-2026:17626
  • Red Hat Enterprise Linux AppStream (v. 8) dovecot 2.3.16-7.el8_10, dovecot-mysql 2.3.16-7.el8_10, dovecot-pgsql 2.3.16-7.el8_10, dovecot-pigeonhole 2.3.16-7.el8_10
    fixed: vendor fix RHSA-2026:13830
  • Red Hat Enterprise Linux AppStream (v. 9) dovecot 2.3.16-18.el9_8, dovecot 2.3.16-15.el9_7.1, dovecot-mysql 2.3.16-18.el9_8, dovecot-pgsql 2.3.16-18.el9_8, dovecot-mysql 2.3.16-15.el9_7.1, dovecot-pgsql 2.3.16-15.el9_7.1, +2 more
    fixed: vendor fix RHSA-2026:13857
  • Red Hat Enterprise Linux AppStream (v. 10) dovecot 2.3.21-19.el10_2, dovecot 2.3.21-16.el10_1.1, dovecot-mysql 2.3.21-19.el10_2, dovecot-pgsql 2.3.21-19.el10_2, dovecot-mysql 2.3.21-16.el10_1.1, dovecot-pgsql 2.3.21-16.el10_1.1, +2 more
    fixed: vendor fix RHSA-2026:13498
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) dovecot 2.3.8-9.el8_4.1, dovecot-mysql 2.3.8-9.el8_4.1, dovecot-pgsql 2.3.8-9.el8_4.1, dovecot-pigeonhole 2.3.8-9.el8_4.1
    fixed: vendor fix RHSA-2026:19455
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) dovecot 2.3.16-2.el8_6.1, dovecot-mysql 2.3.16-2.el8_6.1, dovecot-pgsql 2.3.16-2.el8_6.1, dovecot-pigeonhole 2.3.16-2.el8_6.1 Red Hat Enterprise Linux AppStream E4S (v.8.6) dovecot 2.3.16-2.el8_6.1, dovecot-mysql 2.3.16-2.el8_6.1, dovecot-pgsql 2.3.16-2.el8_6.1, dovecot-pigeonhole 2.3.16-2.el8_6.1
    fixed: vendor fix RHSA-2026:19453
show 14 more
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) dovecot 2.3.16-3.el8_8.1, dovecot-mysql 2.3.16-3.el8_8.1, dovecot-pgsql 2.3.16-3.el8_8.1, dovecot-pigeonhole 2.3.16-3.el8_8.1
    fixed: vendor fix RHSA-2026:18053
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) dovecot 2.3.16-3.el9_0.1, dovecot-mysql 2.3.16-3.el9_0.1, dovecot-pgsql 2.3.16-3.el9_0.1, dovecot-pigeonhole 2.3.16-3.el9_0.1
    fixed: vendor fix RHSA-2026:17630
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) dovecot 2.3.16-8.el9_2.2, dovecot-mysql 2.3.16-8.el9_2.2, dovecot-pgsql 2.3.16-8.el9_2.2, dovecot-pigeonhole 2.3.16-8.el9_2.2
    fixed: vendor fix RHSA-2026:17628
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) dovecot 2.3.21-16.el10_0.1, dovecot-mysql 2.3.21-16.el10_0.1, dovecot-pgsql 2.3.21-16.el10_0.1, dovecot-pigeonhole 2.3.21-16.el10_0.1
    fixed: vendor fix RHSA-2026:17602
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) dovecot 2.3.16-11.el9_4.2, dovecot-mysql 2.3.16-11.el9_4.2, dovecot-pgsql 2.3.16-11.el9_4.2, dovecot-pigeonhole 2.3.16-11.el9_4.2
    fixed: vendor fix RHSA-2026:17625
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) dovecot 2.3.16-15.el9_6.1, dovecot-mysql 2.3.16-15.el9_6.1, dovecot-pgsql 2.3.16-15.el9_6.1, dovecot-pigeonhole 2.3.16-15.el9_6.1
    fixed: vendor fix RHSA-2026:17626
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) dovecot 2.3.8-9.el8_4.1, dovecot-mysql 2.3.8-9.el8_4.1, dovecot-pgsql 2.3.8-9.el8_4.1, dovecot-pigeonhole 2.3.8-9.el8_4.1
    fixed: vendor fix RHSA-2026:19455
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) dovecot 2.3.16-2.el8_6.1, dovecot-mysql 2.3.16-2.el8_6.1, dovecot-pgsql 2.3.16-2.el8_6.1, dovecot-pigeonhole 2.3.16-2.el8_6.1
    fixed: vendor fix RHSA-2026:19453
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) dovecot 2.3.16-3.el8_8.1, dovecot-mysql 2.3.16-3.el8_8.1, dovecot-pgsql 2.3.16-3.el8_8.1, dovecot-pigeonhole 2.3.16-3.el8_8.1
    fixed: vendor fix RHSA-2026:18053
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dovecot 2.3.16-18.el9_8, dovecot 2.3.16-15.el9_7.1
    fixed: vendor fix RHSA-2026:13857
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dovecot-devel 2.3.21-19.el10_2, dovecot-devel 2.3.21-16.el10_1.1, dovecot-debuginfo 2.3.21-19.el10_2, dovecot-debuginfo 2.3.21-16.el10_1.1, dovecot-debugsource 2.3.21-19.el10_2, dovecot-debugsource 2.3.21-16.el10_1.1, +6 more
    fixed: vendor fix RHSA-2026:13498
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) dovecot-devel 2.3.21-16.el10_0.1, dovecot-debuginfo 2.3.21-16.el10_0.1, dovecot-debugsource 2.3.21-16.el10_0.1, dovecot-mysql-debuginfo 2.3.21-16.el10_0.1, dovecot-pgsql-debuginfo 2.3.21-16.el10_0.1, dovecot-pigeonhole-debuginfo 2.3.21-16.el10_0.1
    fixed: vendor fix RHSA-2026:17602
  • Red Hat Enterprise Linux CRB (v. 8) dovecot 2.3.16-7.el8_10
    fixed: vendor fix RHSA-2026:13830
  • Red Hat Enterprise Linux Server (v. 7 ELS) dovecot 2.2.36-8.el7_9.1, dovecot-mysql 2.2.36-8.el7_9.1, dovecot-pgsql 2.2.36-8.el7_9.1, dovecot-pigeonhole 2.2.36-8.el7_9.1 Red Hat Enterprise Linux Server Optional (v. 7 ELS) dovecot-devel 2.2.36-8.el7_9.1, dovecot-debuginfo 2.2.36-8.el7_9.1
    fixed: vendor fix RHSA-2026:26564

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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
7 mo ago

Exploit prediction

0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Open-Xchange GmbH OX Dovecot Pro
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-229 Improper Handling of Values

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.