CVE-2025-55229

mediumpriority · track · 0EPSS 0.005 · 43 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.51% (43rd) EPSS

CVSS 5.3 · medium

Is it mine?

85 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · msrc_csaf

EPSS · scored 2026-10-27

Improper verification of cryptographic signature in Windows Certificates allows an unauthorized attacker to perform spoofing over a network.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedWindows 10 Version 1607 for 32-bit Systemsmsrc_csaf
10.0.14393.8066:Security Update:https://support.microsoft.com/help/5058383
https://support.microsoft.com/help/5058383
FixedWindows 10 Version 1607 for x64-based Systemsmsrc_csaf
10.0.14393.8066:Security Update:https://support.microsoft.com/help/5058383
https://support.microsoft.com/help/5058383
FixedWindows 10 Version 1809 for 32-bit Systemsmsrc_csaf
10.0.17763.7314:Security Update:https://support.microsoft.com/help/5058392
https://support.microsoft.com/help/5058392
FixedWindows 10 Version 1809 for x64-based Systemsmsrc_csaf
10.0.17763.7314:Security Update:https://support.microsoft.com/help/5058392
https://support.microsoft.com/help/5058392
FixedWindows 10 Version 21H2 for 32-bit Systemsmsrc_csaf
10.0.19044.5854:Security Update:https://support.microsoft.com/help/5058379
https://support.microsoft.com/help/5058379
FixedWindows 10 Version 21H2 for ARM64-based Systemsmsrc_csaf
10.0.19044.5854:Security Update:https://support.microsoft.com/help/5058379
https://support.microsoft.com/help/5058379
FixedWindows 10 Version 21H2 for x64-based Systemsmsrc_csaf
10.0.19044.5854:Security Update:https://support.microsoft.com/help/5058379
https://support.microsoft.com/help/5058379
FixedWindows 10 Version 22H2 for 32-bit Systemsmsrc_csaf
10.0.19045.5854:Security Update:https://support.microsoft.com/help/5058379
https://support.microsoft.com/help/5058379
FixedWindows 10 Version 22H2 for ARM64-based Systemsmsrc_csaf
10.0.19045.5854:Security Update:https://support.microsoft.com/help/5058379
https://support.microsoft.com/help/5058379
FixedWindows 10 Version 22H2 for x64-based Systemsmsrc_csaf
10.0.19045.5854:Security Update:https://support.microsoft.com/help/5058379
https://support.microsoft.com/help/5058379
FixedWindows 10 for 32-bit Systemsmsrc_csaf
10.0.10240.21014:Security Update:https://support.microsoft.com/help/5058387
https://support.microsoft.com/help/5058387
FixedWindows 10 for x64-based Systemsmsrc_csaf
10.0.10240.21014:Security Update:https://support.microsoft.com/help/5058387
https://support.microsoft.com/help/5058387
FixedWindows 11 Version 22H2 for ARM64-based Systemsmsrc_csaf
10.0.22621.5335:Security Update:https://support.microsoft.com/help/5058405
https://support.microsoft.com/help/5058405
FixedWindows 11 Version 22H2 for x64-based Systemsmsrc_csaf
10.0.22621.5335:Security Update:https://support.microsoft.com/help/5058405
https://support.microsoft.com/help/5058405
FixedWindows 11 Version 23H2 for ARM64-based Systemsmsrc_csaf
10.0.22631.5335:Security Update:https://support.microsoft.com/help/5058405
https://support.microsoft.com/help/5058405
FixedWindows 11 Version 23H2 for x64-based Systemsmsrc_csaf
10.0.22631.5335:Security Update:https://support.microsoft.com/help/5058405
https://support.microsoft.com/help/5058405
FixedWindows 11 Version 24H2 for ARM64-based Systemsmsrc_csaf
10.0.26100.4061:Security Update:https://support.microsoft.com/help/5058411
https://support.microsoft.com/help/5058411
FixedWindows 11 Version 24H2 for x64-based Systemsmsrc_csaf
10.0.26100.4061:Security Update:https://support.microsoft.com/help/5058411
https://support.microsoft.com/help/5058411
FixedWindows Server 2016msrc_csaf
10.0.14393.8066:Security Update:https://support.microsoft.com/help/5058383
https://support.microsoft.com/help/5058383
FixedWindows Server 2016 (Server Core installation)msrc_csaf
10.0.14393.8066:Security Update:https://support.microsoft.com/help/5058383
https://support.microsoft.com/help/5058383
FixedWindows Server 2019msrc_csaf
10.0.17763.7314:Security Update:https://support.microsoft.com/help/5058392
https://support.microsoft.com/help/5058392
FixedWindows Server 2019 (Server Core installation)msrc_csaf
10.0.17763.7314:Security Update:https://support.microsoft.com/help/5058392
https://support.microsoft.com/help/5058392
FixedWindows Server 2022msrc_csaf
10.0.20348.3692:Security Update:https://support.microsoft.com/help/5058385
https://support.microsoft.com/help/5058385
FixedWindows Server 2022 (Server Core installation)msrc_csaf
10.0.20348.3692:Security Update:https://support.microsoft.com/help/5058385
https://support.microsoft.com/help/5058385
FixedWindows Server 2022, 23H2 Edition (Server Core installation)msrc_csaf
10.0.25398.1611:Security Update:https://support.microsoft.com/help/5058384
https://support.microsoft.com/help/5058384
FixedWindows Server 2025msrc_csaf
10.0.26100.4061:Security Update:https://support.microsoft.com/help/5058411
https://support.microsoft.com/help/5058411
FixedWindows Server 2025 (Server Core installation)msrc_csaf
10.0.26100.4061:Security Update:https://support.microsoft.com/help/5058411
https://support.microsoft.com/help/5058411

cvss

Technical severity, 0–10. One row per scoring source.

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:Csecondary · ENISA EU

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · secure@microsoft.com USexploitability 3.9 · impact 1.4

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-347USCWE-347US

affected products (85)

Products and version ranges known to be affected.

Microsoft Windowsall versionscert_bundDEcpe:/o:microsoft:windows:-
Microsoft Windows 10 Version 150710.0.10240.0 → 10.0.10240.21014enisa_euvdEU
Microsoft Windows 10 Version 160710.0.14393.0 → 10.0.14393.8066enisa_euvdEU
Microsoft Windows 10 Version 180910.0.17763.0 → 10.0.17763.7314enisa_euvdEU
Microsoft Windows 10 Version 21H210.0.19044.0 → 10.0.19044.5854enisa_euvdEU
Microsoft Windows 10 Version 22H210.0.19045.0 → 10.0.19045.5854enisa_euvdEU
Microsoft Windows 11 Version 23H210.0.22631.0 → 10.0.22631.5335enisa_euvdEU
Microsoft Windows 11 Version 24H210.0.26100.0 → 10.0.26100.4061enisa_euvdEU
Microsoft Windows 11 version 22H210.0.22621.0 → 10.0.22621.5335enisa_euvdEU
Microsoft Windows 11 version 22H310.0.22631.0 → 10.0.22631.5335enisa_euvdEU
Microsoft Windows Server 201610.0.14393.0 → 10.0.14393.8066enisa_euvdEU
Microsoft Windows Server 2016 (Server Core installation)10.0.14393.0 → 10.0.14393.8066enisa_euvdEU
Microsoft Windows Server 201910.0.17763.0 → 10.0.17763.7314enisa_euvdEU
Microsoft Windows Server 2019 (Server Core installation)10.0.17763.0 → 10.0.17763.7314enisa_euvdEU
Microsoft Windows Server 202210.0.20348.0 → 10.0.20348.3692enisa_euvdEU
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)10.0.25398.0 → 10.0.25398.1611enisa_euvdEU
Microsoft Windows Server 202510.0.26100.0 → 10.0.26100.4061enisa_euvdEU
Microsoft Windows Server 2025 (Server Core installation)10.0.26100.0 → 10.0.26100.4061enisa_euvdEU
Windows 10 Version 1607 for 32-bit Systemsall versionsfixedmsrc_csafUS
Windows 10 Version 1607 for 32-bit Systems< 10.0.14393.8066msrc_csafUS

showing 20 of 85

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-1891Microsoft Windows: Mehrere SchwachstellenDeutsch2025-08-21csaf · cert_bundDE
Ein entfernter anonymer Angreifer oder ein lokaler Angreifer kann mehrere Schwachstellen in Microsoft Windows ausnutzen, um Spoofing-Angriffe durchzuführen, Root-Rechte zu erlangen und beliebigen Code auszuführen.
msrc_CVE-2025-55229Windows Certificate Spoofing Vulnerability2025-08-12csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund msrc_csaf NVD CVE.org MITRE

published 2025-08-21modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

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