CVE-2025-59259

mediumpriority · track · 1EPSS 0.015 · 74 %ileDEEUNLRUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.50% (74th) EPSS

CVSS 6.5 · medium

Is it mine?

177 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service 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
10.0.14393.8519:Security Update:https://support.microsoft.com/help/5066836
https://support.microsoft.com/help/5066836
FixedWindows 10 Version 1607 for x64-based Systemsmsrc_csaf
10.0.14393.8519:Security Update:https://support.microsoft.com/help/5066836
https://support.microsoft.com/help/5066836
FixedWindows 10 Version 1809 for 32-bit Systemsmsrc_csaf
10.0.17763.7919:Security Update:https://support.microsoft.com/help/5066586
https://support.microsoft.com/help/5066586
FixedWindows 10 Version 1809 for x64-based Systemsmsrc_csaf
10.0.17763.7919:Security Update:https://support.microsoft.com/help/5066586
https://support.microsoft.com/help/5066586
FixedWindows 10 Version 21H2 for 32-bit Systemsmsrc_csaf
10.0.19044.6456:Security Update:https://support.microsoft.com/help/5066791
https://support.microsoft.com/help/5066791
FixedWindows 10 Version 21H2 for ARM64-based Systemsmsrc_csaf
10.0.19044.6456:Security Update:https://support.microsoft.com/help/5066791
https://support.microsoft.com/help/5066791
FixedWindows 10 Version 21H2 for x64-based Systemsmsrc_csaf
10.0.19044.6456:Security Update:https://support.microsoft.com/help/5066791
https://support.microsoft.com/help/5066791
FixedWindows 10 Version 22H2 for 32-bit Systemsmsrc_csaf
10.0.19045.6456:Security Update:https://support.microsoft.com/help/5066791
https://support.microsoft.com/help/5066791
FixedWindows 10 Version 22H2 for ARM64-based Systemsmsrc_csaf
10.0.19045.6456:Security Update:https://support.microsoft.com/help/5066791
https://support.microsoft.com/help/5066791
FixedWindows 10 Version 22H2 for x64-based Systemsmsrc_csaf
10.0.19045.6456:Security Update:https://support.microsoft.com/help/5066791
https://support.microsoft.com/help/5066791
FixedWindows 10 for 32-bit Systemsmsrc_csaf
10.0.10240.21161:Security Update:https://support.microsoft.com/help/5066837
https://support.microsoft.com/help/5066837
FixedWindows 10 for x64-based Systemsmsrc_csaf
10.0.10240.21161:Security Update:https://support.microsoft.com/help/5066837
https://support.microsoft.com/help/5066837
FixedWindows 11 Version 22H2 for ARM64-based Systemsmsrc_csaf
10.0.22621.6060:Security Update:https://support.microsoft.com/help/5066793
https://support.microsoft.com/help/5066793
FixedWindows 11 Version 22H2 for x64-based Systemsmsrc_csaf
10.0.22621.6060:Security Update:https://support.microsoft.com/help/5066793
https://support.microsoft.com/help/5066793
FixedWindows 11 Version 23H2 for ARM64-based Systemsmsrc_csaf
10.0.22631.6060:Security Update:https://support.microsoft.com/help/5066793
https://support.microsoft.com/help/5066793
FixedWindows 11 Version 23H2 for x64-based Systemsmsrc_csaf
10.0.22631.6060:Security Update:https://support.microsoft.com/help/5066793
https://support.microsoft.com/help/5066793
FixedWindows 11 Version 24H2 for ARM64-based Systemsmsrc_csaf
10.0.26100.6899:Security Update:https://support.microsoft.com/help/5066835
https://support.microsoft.com/help/5066835
FixedWindows 11 Version 24H2 for x64-based Systemsmsrc_csaf
10.0.26100.6899:Security Update:https://support.microsoft.com/help/5066835
https://support.microsoft.com/help/5066835
FixedWindows 11 Version 25H2 for ARM64-based Systemsmsrc_csaf
10.0.26200.6899:Security Update:https://support.microsoft.com/help/5066835
https://support.microsoft.com/help/5066835
FixedWindows 11 Version 25H2 for x64-based Systemsmsrc_csaf
10.0.26200.6899:Security Update:https://support.microsoft.com/help/5066835
https://support.microsoft.com/help/5066835
FixedWindows Server 2012msrc_csaf
6.2.9200.25722:Monthly Rollup:https://support.microsoft.com/help/5066875
https://support.microsoft.com/help/5066875
FixedWindows Server 2012 (Server Core installation)msrc_csaf
6.2.9200.25722:Monthly Rollup:https://support.microsoft.com/help/5066875
https://support.microsoft.com/help/5066875
FixedWindows Server 2012 R2msrc_csaf
6.3.9600.22824:Monthly Rollup:https://support.microsoft.com/help/5066873
https://support.microsoft.com/help/5066873
FixedWindows Server 2012 R2 (Server Core installation)msrc_csaf
6.3.9600.22824:Monthly Rollup:https://support.microsoft.com/help/5066873
https://support.microsoft.com/help/5066873
FixedWindows Server 2016msrc_csaf
10.0.14393.8519:Security Update:https://support.microsoft.com/help/5066836
https://support.microsoft.com/help/5066836
FixedWindows Server 2016 (Server Core installation)msrc_csaf
10.0.14393.8519:Security Update:https://support.microsoft.com/help/5066836
https://support.microsoft.com/help/5066836
FixedWindows Server 2019msrc_csaf
10.0.17763.7919:Security Update:https://support.microsoft.com/help/5066586
https://support.microsoft.com/help/5066586
FixedWindows Server 2019 (Server Core installation)msrc_csaf
10.0.17763.7919:Security Update:https://support.microsoft.com/help/5066586
https://support.microsoft.com/help/5066586
FixedWindows Server 2022msrc_csaf
10.0.20348.4294:Security Update:https://support.microsoft.com/help/5066782
https://support.microsoft.com/help/5066782
FixedWindows Server 2022 (Server Core installation)msrc_csaf
10.0.20348.4294:Security Update:https://support.microsoft.com/help/5066782
https://support.microsoft.com/help/5066782
FixedWindows Server 2022, 23H2 Edition (Server Core installation)msrc_csaf
10.0.25398.1913:Security Update:https://support.microsoft.com/help/5066780
https://support.microsoft.com/help/5066780
FixedWindows Server 2025msrc_csaf
10.0.26100.6899:Security Update:https://support.microsoft.com/help/5066835
https://support.microsoft.com/help/5066835
FixedWindows Server 2025 (Server Core installation)msrc_csaf
10.0.26100.6899:Security Update:https://support.microsoft.com/help/5066835
https://support.microsoft.com/help/5066835

cvss

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

6.5

010

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

v3.16.5mediumAV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · secure@microsoft.com USexploitability 2.8 · impact 3.6

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · NCSC-NL NL

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1287USCWE-1287USCWE-1287USCWE-1287US

affected products (177)

Products and version ranges known to be affected.

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
Microsoft Windows 11 Windows Terminalall versionscert_bundDEcpe:/o:microsoft:windows_11:windows_terminal
Microsoft Windows App Client for Desktopall versionscert_bundDEcpe:/o:microsoft:windows:app_client_for_desktop
Microsoft Windows Remote Desktop Clientall versionscert_bundDEcpe:/o:microsoft:windows:remote_desktop_client_for_desktop
Microsoft Windows Server 2008 R2 SP1all versionscert_bundDEcpe:/o:microsoft:windows_server:2008_r2_sp1
Microsoft Windows Server 2008 SP2all versionscert_bundDEcpe:/o:microsoft:windows_server:2008_sp2
Microsoft Windows Server 2012all versionscert_bundDEcpe:/o:microsoft:windows_server_2012:-
Microsoft Windows Server 2012 R2all versionscert_bundDEcpe:/o:microsoft:windows_server_2012_r2:-
Microsoft Windows Server 2016all versionscert_bundDEcpe:/o:microsoft:windows_server_2016:-
Microsoft Windows Server 2019all versionscert_bundDEcpe:/o:microsoft:windows_server_2019:-
Microsoft Windows Server 2022all versionscert_bundDEcpe:/o:microsoft:windows_server_2022:-
Microsoft Windows Server 2022 23H2 Editionall versionscert_bundDEcpe:/o:microsoft:windows_server_2022:23h2_edition
Microsoft Windows Server 2025all versionscert_bundDEcpe:/o:microsoft:windows_server_2025:-

showing 20 of 177

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2025-0310Kwetsbaarheden verholpen in Microsoft WindowsNL2025-10-14csaf · ncsc_nlNL
Microsoft heeft kwetsbaarheden verholpen in Windows.
WID-SEC-W-2025-2307Microsoft Windows: Mehrere SchwachstellenDeutsch2025-10-14csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Microsoft Windows Server, Microsoft Windows Server 2012, Microsoft Windows Server 2012 R2, Microsoft Windows 10, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows, Microsoft Windows Server 2022, Microsoft Windows 11 und Microsoft Windows Server 2025 ausnutzen, um Remote Code Execution, Privilegieneskalation, Datenexfiltration oder Systemabstürze zu verursachen.
msrc_CVE-2025-59259Windows Local Session Manager (LSM) Denial of Service Vulnerability2025-10-14csaf · 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 2025-10-14modified 2026-06-17

references (3)

External citations — patches, advisories, analysis.

scry

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