CVE-2026-42980

highpriority · track · 12EPSS 0.069 · 94 %ileexploit · PoCDEEUJPNLRUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · PoC

Likely / severe?

6.95% (94th) EPSS

CVSS 7.8 · high

Is it mine?

218 products

Check your exposure

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-26

Integer underflow (wrap or wraparound) in Windows NT OS Kernel 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 10 Version 1607 for 32-bit Systemsmsrc_csaf
10.0.14393.9234:Security Update:https://support.microsoft.com/help/5094122
https://support.microsoft.com/help/5094122
FixedWindows 10 Version 1607 for x64-based Systemsmsrc_csaf
10.0.14393.9234:Security Update:https://support.microsoft.com/help/5094122
https://support.microsoft.com/help/5094122
FixedWindows 10 Version 1809 for 32-bit Systemsmsrc_csaf
10.0.17763.8880:Security Update:https://support.microsoft.com/help/5094123
https://support.microsoft.com/help/5094123
FixedWindows 10 Version 1809 for x64-based Systemsmsrc_csaf
10.0.17763.8880:Security Update:https://support.microsoft.com/help/5094123
https://support.microsoft.com/help/5094123
FixedWindows 10 Version 21H2 for 32-bit Systemsmsrc_csaf
10.0.19044.7417:Security Update:https://support.microsoft.com/help/5094127
https://support.microsoft.com/help/5094127
FixedWindows 10 Version 21H2 for ARM64-based Systemsmsrc_csaf
10.0.19044.7417:Security Update:https://support.microsoft.com/help/5094127
https://support.microsoft.com/help/5094127
FixedWindows 10 Version 21H2 for x64-based Systemsmsrc_csaf
10.0.19044.7417:Security Update:https://support.microsoft.com/help/5094127
https://support.microsoft.com/help/5094127
FixedWindows 10 Version 22H2 for 32-bit Systemsmsrc_csaf
10.0.19045.7417:Security Update:https://support.microsoft.com/help/5094127
https://support.microsoft.com/help/5094127
FixedWindows 10 Version 22H2 for ARM64-based Systemsmsrc_csaf
10.0.19045.7417:Security Update:https://support.microsoft.com/help/5094127
https://support.microsoft.com/help/5094127
FixedWindows 10 Version 22H2 for x64-based Systemsmsrc_csaf
10.0.19045.7417:Security Update:https://support.microsoft.com/help/5094127
https://support.microsoft.com/help/5094127
FixedWindows 11 Version 23H2 for ARM64-based Systemsmsrc_csaf
10.0.22631.7219:Security Update:https://support.microsoft.com/help/5093998
https://support.microsoft.com/help/5093998
FixedWindows 11 Version 23H2 for x64-based Systemsmsrc_csaf
10.0.22631.7219:Security Update:https://support.microsoft.com/help/5093998
https://support.microsoft.com/help/5093998
FixedWindows 11 Version 24H2 for ARM64-based Systemsmsrc_csaf
10.0.26100.8655:Security Update:https://support.microsoft.com/help/5094126
https://support.microsoft.com/help/5094126
FixedWindows 11 Version 24H2 for x64-based Systemsmsrc_csaf
10.0.26100.8655:Security Update:https://support.microsoft.com/help/5094126
https://support.microsoft.com/help/5094126
FixedWindows 11 Version 25H2 for ARM64-based Systemsmsrc_csaf
10.0.26200.8655:Security Update:https://support.microsoft.com/help/5094126
https://support.microsoft.com/help/5094126
FixedWindows 11 Version 25H2 for x64-based Systemsmsrc_csaf
10.0.26200.8655:Security Update:https://support.microsoft.com/help/5094126
https://support.microsoft.com/help/5094126
FixedWindows 11 Version 26H1 for ARM64-based Systemsmsrc_csaf
10.0.28000.2269:Security Update:https://support.microsoft.com/help/5095051
https://support.microsoft.com/help/5095051
FixedWindows 11 version 26H1 for x64-based Systemsmsrc_csaf
10.0.28000.2269:Security Update:https://support.microsoft.com/help/5095051
https://support.microsoft.com/help/5095051
FixedWindows Server 2012msrc_csaf
6.2.9200.26132:Monthly Rollup:https://support.microsoft.com/help/5094042
https://support.microsoft.com/help/5094042
FixedWindows Server 2012 (Server Core installation)msrc_csaf
6.2.9200.26132:Monthly Rollup:https://support.microsoft.com/help/5094042
https://support.microsoft.com/help/5094042
FixedWindows Server 2012 R2msrc_csaf
6.3.9600.23228:Monthly Rollup:https://support.microsoft.com/help/5094041
https://support.microsoft.com/help/5094041
FixedWindows Server 2012 R2 (Server Core installation)msrc_csaf
6.3.9600.23228:Monthly Rollup:https://support.microsoft.com/help/5094041
https://support.microsoft.com/help/5094041
FixedWindows Server 2016msrc_csaf
10.0.14393.9234:Security Update:https://support.microsoft.com/help/5094122
https://support.microsoft.com/help/5094122
FixedWindows Server 2016 (Server Core installation)msrc_csaf
10.0.14393.9234:Security Update:https://support.microsoft.com/help/5094122
https://support.microsoft.com/help/5094122
FixedWindows Server 2019msrc_csaf
10.0.17763.8880:Security Update:https://support.microsoft.com/help/5094123
https://support.microsoft.com/help/5094123
FixedWindows Server 2019 (Server Core installation)msrc_csaf
10.0.17763.8880:Security Update:https://support.microsoft.com/help/5094123
https://support.microsoft.com/help/5094123
FixedWindows Server 2022msrc_csaf
10.0.20348.5256:Security Update:https://support.microsoft.com/help/5094128
https://support.microsoft.com/help/5094128
FixedWindows Server 2022 (Server Core installation)msrc_csaf
10.0.20348.5256:Security Update:https://support.microsoft.com/help/5094128
https://support.microsoft.com/help/5094128
FixedWindows Server 2025msrc_csaf
10.0.26100.32995:Security Update:https://support.microsoft.com/help/5094125
https://support.microsoft.com/help/5094125
FixedWindows Server 2025 (Server Core installation)msrc_csaf
10.0.26100.32995:Security Update:https://support.microsoft.com/help/5094125
https://support.microsoft.com/help/5094125

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

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

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

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

v3.17.4highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · 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: poc · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-122USCWE-122USCWE-122USCWE-191USCWE-191USCWE-191US

exploits (2)

Public proof-of-concept and weaponised exploit code.

G4sp4rCS/CVE-2026-42980-POCCVE-2026-42980 PUBLIC EXPLOIT + RESEARCHPoC · poc_in_github
ZeroDayEvil/CVE-2026-42980-PoCZeroDayEvil/CVE-2026-42980-PoCPoC · poc_in_github

affected products (218)

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
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 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 Version 25H2all versionscert_bundDEcpe:/o:microsoft:windows_11:version_25h2
Microsoft Windows App Client for Desktopall versionscert_bundDEcpe:/o:microsoft:windows:app_client_for_desktop
Microsoft Windows Narrator Brailleall versionscert_bundDEcpe:/o:microsoft:windows:narrator_braille
Microsoft Windows Remote Desktop Clientall versionscert_bundDEcpe:/o:microsoft:windows:remote_desktop_client_for_desktop
Microsoft Windows Server 2012all versionscert_bundDEcpe:/o:microsoft:windows_server_2012:-
Microsoft Windows Server 2012 R2all versionscert_bundDEcpe:/o:microsoft:windows_server_2012_r2:-

showing 20 of 218

advisories (4)

Vendor and ecosystem advisories describing this.

NCSC-2026-0181Kwetsbaarheden verholpen in Microsoft WindowsNL2026-06-09csaf · ncsc_nlNL
Microsoft heeft een groot aantal kwetsbaarheden verholpen in Windows.
WID-SEC-W-2026-1849Microsoft Windows: Mehrere SchwachstellenDeutsch2026-06-09csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in verschiedenen Versionen von Microsoft Windows und Microsoft Windows Server ausnutzen, um Administratorrechte zu erlangen, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren und offenzulegen oder Spoofing-Angriffe durchzuführen.
msrc_CVE-2026-42980NT OS Kernel Elevation of Privilege Vulnerability2026-06-09csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
JVNDB-2026-029749JVN iPedia advisory JVNDB-2026-0297492026-08-24vendor · jvndbJP

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 jvndb NVD CVE.org MITRE

published 2026-06-09modified 2026-07-29

references (3)

External citations — patches, advisories, analysis.

scry

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