CVE-2025-55234

criticalpriority · attend · 56EPSS 0.206 · 98 %ileexploit · PoCDEEUNLRUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · PoC

Likely / severe?

20.6% (98th) EPSS

CVSS 9.8 · critical

Is it mine?

204 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-26

SMB Server might be susceptible to relay attacks depending on the configuration. An attacker who successfully exploited these vulnerabilities could perform relay attacks and make the users subject to elevation of privilege attacks. The SMB Server already supports mechanisms for hardening against relay attacks: SMB Server signing SMB Server Extended Protection for Authentication (EPA) Microsoft is releasing this CVE to provide customers with audit capabilities to help them to assess their environment and to identify any potential device or software incompatibility issues before deploying SMB Server hardening measures that protect against relay attacks. If you have not already enabled SMB Server hardening measures, we advise customers to take the following actions to be protected from these relay attacks: Assess your environment by utilizing the audit capabilities that we are exposing in the September 2025 security updates. See Support for Audit Events to deploy SMB Server Hardening—SMB Server Signing & SMB Server EPA. Adopt appropriate SMB Server hardening measures.

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
10.0.14393.8422:Security Update:https://support.microsoft.com/help/5065427
https://support.microsoft.com/help/5065427
FixedWindows 10 Version 1607 for x64-based Systemsmsrc_csaf
10.0.14393.8422:Security Update:https://support.microsoft.com/help/5065427
https://support.microsoft.com/help/5065427
FixedWindows 10 Version 1809 for 32-bit Systemsmsrc_csaf
10.0.17763.7792:Security Update:https://support.microsoft.com/help/5065428
https://support.microsoft.com/help/5065428
FixedWindows 10 Version 1809 for x64-based Systemsmsrc_csaf
10.0.17763.7792:Security Update:https://support.microsoft.com/help/5065428
https://support.microsoft.com/help/5065428
FixedWindows 10 Version 21H2 for 32-bit Systemsmsrc_csaf
10.0.19044.6332:Security Update:https://support.microsoft.com/help/5065429
https://support.microsoft.com/help/5065429
FixedWindows 10 Version 21H2 for ARM64-based Systemsmsrc_csaf
10.0.19044.6332:Security Update:https://support.microsoft.com/help/5065429
https://support.microsoft.com/help/5065429
FixedWindows 10 Version 21H2 for x64-based Systemsmsrc_csaf
10.0.19044.6332:Security Update:https://support.microsoft.com/help/5065429
https://support.microsoft.com/help/5065429
FixedWindows 10 Version 22H2 for 32-bit Systemsmsrc_csaf
10.0.19045.6332:Security Update:https://support.microsoft.com/help/5065429
https://support.microsoft.com/help/5065429
FixedWindows 10 Version 22H2 for ARM64-based Systemsmsrc_csaf
10.0.19045.6332:Security Update:https://support.microsoft.com/help/5065429
https://support.microsoft.com/help/5065429
FixedWindows 10 Version 22H2 for x64-based Systemsmsrc_csaf
10.0.19045.6332:Security Update:https://support.microsoft.com/help/5065429
https://support.microsoft.com/help/5065429
FixedWindows 10 for 32-bit Systemsmsrc_csaf
10.0.10240.21128:Security Update:https://support.microsoft.com/help/5065430
https://support.microsoft.com/help/5065430
FixedWindows 10 for x64-based Systemsmsrc_csaf
10.0.10240.21128:Security Update:https://support.microsoft.com/help/5065430
https://support.microsoft.com/help/5065430
FixedWindows 11 Version 22H2 for ARM64-based Systemsmsrc_csaf
10.0.22621.5909:Security Update:https://support.microsoft.com/help/5065431
https://support.microsoft.com/help/5065431
FixedWindows 11 Version 22H2 for x64-based Systemsmsrc_csaf
10.0.22621.5909:Security Update:https://support.microsoft.com/help/5065431
https://support.microsoft.com/help/5065431
FixedWindows 11 Version 23H2 for ARM64-based Systemsmsrc_csaf
10.0.22631.5909:Security Update:https://support.microsoft.com/help/5065431
https://support.microsoft.com/help/5065431
FixedWindows 11 Version 23H2 for x64-based Systemsmsrc_csaf
10.0.22631.5909:Security Update:https://support.microsoft.com/help/5065431
https://support.microsoft.com/help/5065431
FixedWindows 11 Version 24H2 for ARM64-based Systemsmsrc_csaf
10.0.26100.6584:Security Update:https://support.microsoft.com/help/5065426
https://support.microsoft.com/help/5065426
FixedWindows 11 Version 24H2 for x64-based Systemsmsrc_csaf
10.0.26100.6584:Security Update:https://support.microsoft.com/help/5065426
https://support.microsoft.com/help/5065426
FixedWindows Server 2008 R2 for x64-based Systems Service Pack 1msrc_csaf
6.1.7601.27929:Monthly Rollup:https://support.microsoft.com/help/5065468
https://support.microsoft.com/help/5065468
FixedWindows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)msrc_csaf
6.1.7601.27929:Monthly Rollup:https://support.microsoft.com/help/5065468
https://support.microsoft.com/help/5065468
FixedWindows Server 2008 for 32-bit Systems Service Pack 2msrc_csaf
6.0.6003.23529:Monthly Rollup:https://support.microsoft.com/help/5065508
https://support.microsoft.com/help/5065508
FixedWindows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)msrc_csaf
6.0.6003.23529:Monthly Rollup:https://support.microsoft.com/help/5065508
https://support.microsoft.com/help/5065508
FixedWindows Server 2008 for x64-based Systems Service Pack 2msrc_csaf
6.0.6003.23529:Monthly Rollup:https://support.microsoft.com/help/5065508
https://support.microsoft.com/help/5065508
FixedWindows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)msrc_csaf
6.0.6003.23529:Monthly Rollup:https://support.microsoft.com/help/5065508
https://support.microsoft.com/help/5065508
FixedWindows Server 2012msrc_csaf
6.2.9200.25675:Monthly Rollup:https://support.microsoft.com/help/5065509
https://support.microsoft.com/help/5065509
FixedWindows Server 2012 (Server Core installation)msrc_csaf
6.2.9200.25675:Monthly Rollup:https://support.microsoft.com/help/5065509
https://support.microsoft.com/help/5065509
FixedWindows Server 2012 R2msrc_csaf
6.3.9600.22774:Monthly Rollup:https://support.microsoft.com/help/5065507
https://support.microsoft.com/help/5065507
FixedWindows Server 2012 R2 (Server Core installation)msrc_csaf
6.3.9600.22774:Monthly Rollup:https://support.microsoft.com/help/5065507
https://support.microsoft.com/help/5065507
FixedWindows Server 2016msrc_csaf
10.0.14393.8422:Security Update:https://support.microsoft.com/help/5065427
https://support.microsoft.com/help/5065427
FixedWindows Server 2016 (Server Core installation)msrc_csaf
10.0.14393.8422:Security Update:https://support.microsoft.com/help/5065427
https://support.microsoft.com/help/5065427
FixedWindows Server 2019msrc_csaf
10.0.17763.7792:Security Update:https://support.microsoft.com/help/5065428
https://support.microsoft.com/help/5065428
FixedWindows Server 2019 (Server Core installation)msrc_csaf
10.0.17763.7792:Security Update:https://support.microsoft.com/help/5065428
https://support.microsoft.com/help/5065428
FixedWindows Server 2022msrc_csaf
10.0.20348.4106:Security Hotpatch Update:https://support.microsoft.com/help/5065306
https://support.microsoft.com/help/5065306
FixedWindows Server 2022 (Server Core installation)msrc_csaf
10.0.20348.4106:Security Hotpatch Update:https://support.microsoft.com/help/5065306
https://support.microsoft.com/help/5065306
FixedWindows Server 2022, 23H2 Edition (Server Core installation)msrc_csaf
10.0.25398.1849:Security Update:https://support.microsoft.com/help/5065425
https://support.microsoft.com/help/5065425
FixedWindows Server 2025msrc_csaf
10.0.26100.6584:Security Update:https://support.microsoft.com/help/5065426
https://support.microsoft.com/help/5065426
FixedWindows Server 2025 (Server Core installation)msrc_csaf
10.0.26100.6584:Security Update:https://support.microsoft.com/help/5065426
https://support.microsoft.com/help/5065426

cvss

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

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.8–9.8

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.18.8highAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 2.8 · impact 5.9

v3.19.3criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/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: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-287USCWE-287USCWE-287USCWE-287US

exploits (2)

Public proof-of-concept and weaponised exploit code.

affected products (204)

Products and version ranges known to be affected.

Hitachi Virtual Storage Platform 5100all versionscert_bundDEcpe:/h:hitachi:virtual_storage_platform:5100
Hitachi Virtual Storage Platform 5100Hall versionscert_bundDEcpe:/h:hitachi:virtual_storage_platform:5100h
Hitachi Virtual Storage Platform 5200all versionscert_bundDEcpe:/h:hitachi:virtual_storage_platform:5200
Hitachi Virtual Storage Platform 5200Hall versionscert_bundDEcpe:/h:hitachi:virtual_storage_platform:5200h
Hitachi Virtual Storage Platform 5500all versionscert_bundDEcpe:/h:hitachi:virtual_storage_platform:5500
Hitachi Virtual Storage Platform 5500Hall versionscert_bundDEcpe:/h:hitachi:virtual_storage_platform:5500h
Hitachi Virtual Storage Platform 5600all versionscert_bundDEcpe:/h:hitachi:virtual_storage_platform:5600
Hitachi Virtual Storage Platform 5600Hall versionscert_bundDEcpe:/h:hitachi:virtual_storage_platform:5600h
Hitachi Virtual Storage Platform F1500all versionscert_bundDEcpe:/h:hitachi:virtual_storage_platform:f1500
Hitachi Virtual Storage Platform G1000all versionscert_bundDEcpe:/h:hitachi:virtual_storage_platform:g1000
Hitachi Virtual Storage Platform G1500all versionscert_bundDEcpe:/h:hitachi:virtual_storage_platform:g1500
Hitachi Virtual Storage Platform VX7all versionscert_bundDEcpe:/h:hitachi:virtual_storage_platform:vx7
Microsoft Windows 10all versionscert_bundDEcpe:/o:microsoft:windows_10:-
Microsoft Windows 10 Version 1607all versionscert_bundDEcpe:/o:microsoft:windows_10:version_1607
Microsoft Windows 10 Version 1809all versionscert_bundDEcpe:/o:microsoft:windows_10:version_1809
Microsoft Windows 10 Version 21H2all versionscert_bundDEcpe:/o:microsoft:windows_10:version_21h2
Microsoft Windows 10 Version 22H2all versionscert_bundDEcpe:/o:microsoft:windows_10:version_22h2
Microsoft Windows 11 Version 22H2all versionscert_bundDEcpe:/o:microsoft:windows_11:version_22h2
Microsoft Windows 11 Version 23H2all versionscert_bundDEcpe:/o:microsoft:windows_11:version_23h2
Microsoft Windows 11 Version 24H2all versionscert_bundDEcpe:/o:microsoft:windows_11:version_24h2

showing 20 of 204

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2025-0277Kwetsbaarheden verholpen in Microsoft WindowsNL2025-09-09csaf · ncsc_nlNL
Microsoft heeft kwetsbaarheden verholpen in Windows.
WID-SEC-W-2025-2005Microsoft Windows und Windows Server: Mehrere SchwachstellenDeutsch2025-09-09csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Microsoft Windows und Microsoft Windows Server ausnutzen, um seine Privilegien zu erhöhen, um Sicherheitsvorkehrungen zu umgehen, um Informationen offenzulegen, um beliebigen Programmcode auszuführen, und um einen Denial of Service Angriff durchzuführen.
msrc_CVE-2025-55234Windows SMB Elevation of Privilege Vulnerability2025-09-09csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund ncsc_nl msrc_csaf NVD CVE.org MITRE

published 2025-09-09modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

scry

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