CVE-2026-58634

highpriority · track · 31EPSS 0.003 · 26 %ileDEEUNLUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.33% (26th) EPSS

CVSS 7.8 · high

Is it mine?

24 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · msrc_csaf

EPSS · scored 2026-10-27

Use after free in Desktop Window Manager allows an authorized attacker to elevate privileges locally.

remediations

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

A vendor fix is available.

FixedWindows 11 Version 26H1 for ARM64-based Systemsmsrc_csaf
10.0.28000.2525:Security Update:https://support.microsoft.com/help/5101649
https://support.microsoft.com/help/5101649
FixedWindows 11 version 26H1 for x64-based Systemsmsrc_csaf
10.0.28000.2525:Security Update:https://support.microsoft.com/help/5101649
https://support.microsoft.com/help/5101649

cvss

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

7.8

010

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

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · secure@microsoft.com USexploitability 1.8 · impact 5.9

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · NCSC-NL NL

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/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-416USprimaryCWE-416USCWE-416US

affected products (24)

Products and version ranges known to be affected.

Hitachi Storageall versionscert_bundDEcpe:/h:hitachi:storage:-
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 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 Version 25H2all versionscert_bundDEcpe:/o:microsoft:windows_11:version_25h2
Microsoft Windows 11 Version 26H1all versionscert_bundDEcpe:/o:microsoft:windows_11:version_26h1
Microsoft Windows Admin Centerall versionscert_bundDEcpe:/a:microsoft:windows_admin_center:-
Microsoft Windows Remote Helpall versionscert_bundDEcpe:/o:microsoft:windows:remote_help
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 2025all versionscert_bundDEcpe:/o:microsoft:windows_server_2025:-
Microsoft Windows 11 version 26H110.0.28000.0 → 10.0.28000.2525enisa_euvdEU
Microsoft Windows 11 Version 26H1 for ARM64-based Systemsall versionsfixedmsrc_csafUS
Microsoft Windows 11 Version 26H1 for ARM64-based Systems< 10.0.28000.2525msrc_csafUS

showing 20 of 24

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2026-0231Kwetsbaarheden verholpen in Microsoft WindowsNL2026-07-14csaf · ncsc_nlNL
Microsoft heeft een zeer groot aantal kwetsbaarheden verholpen in Windows.
WID-SEC-W-2026-2316Microsoft Windows Produkte: Mehrere SchwachstellenDeutsch2026-07-14csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Microsoft Windows Produkten ausnutzen, um seine Privilegien zu erhöhen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um falsche Informationen darzustellen, um Daten zu manipulieren, und um Sicherheitsvorkehrungen zu umgehen.
msrc_CVE-2026-58634Desktop Window Manager Elevation of Privilege Vulnerability2026-07-14csaf · 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 ncsc_nl NVD CVE.org MITRE

published 2026-07-14modified 2026-10-24

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+12230 more

references (3)

External citations — patches, advisories, analysis.

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