CVE-2026-21231Disclosure(microsoft / windows_10_1607)

LOWCVSS 7.8 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Kernel allows an authorized attacker to elevate privileges locally.

0.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-362

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • windows_10_1607
  • windows_10_1809
  • windows_10_21h2
  • windows_10_22h2

Threat summary

  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • General: 1 classified signal
  • Peaked at 2 mentions on most recent observed day (2026-02-11)
  • 3 total mentions across 2 days

Affected systems

Vendors
Products
windows_10_1607windows_10_1809windows_10_21h2windows_10_22h2windows_11_23h2windows_11_24h2windows_11_25h2windows_server_2012windows_server_2016windows_server_2019

2 versions affected across 13 products

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-02-10: 1Mentions · 2026-02-11: 2Technical Details · 2026-02-10: 1Technical Details · 2026-02-11: 102-1002-11
Signal classification2 categories
Disclosure
266.7%
General
133.3%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-02-101
Disclosure1
2026-02-112
Disclosure1General1
Full discourse3 posts
  • kawn@kawn2020
    Disclosure

    #windowsupdate #microsoft (つづき) ・CVE-2026-21525 6.2 Windows Remote Access Connection Manager ・CVE-2026-21533 7.8 Windows リモート デスクトップ -悪用される可能性が高い:5 件 ・CVE-2026-21231 7.8 Windows カーネル (つづく…)

    Post summary

    The tweet lists newly disclosed CVEs affecting Windows components and notes that some are likely to be exploited, but it does not provide PoC, exploit code, patches, or evidence of active exploitation.

    10000126
    89 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-21231 Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Kernel allows an authorized attacker to elevate privileges loca… https://www.cve.org/CVERecord?id=CVE-2026-21231

    Post summary

    The text announces the new CVE-2026-21231, describing a race condition in the Windows Kernel that enables privilege escalation by authorized users.

    00010170
    56.5K followersView on X
  • RedPacket Security@RedPacketSec
    General

    CVE Alert: CVE-2026-21231 - Microsoft - Windows 10 Version 1809 - https://www.redpacketsecurity.com/cve-alert-cve-2026-21231-microsoft-windows-10-version-1809/ #OSINT #ThreatIntel #CyberSecurity #cve-2026-21231 #microsoft #windows-10-version-1809

    Post summary

    A CVE alert is posted for CVE-2026-21231 on Windows 10 Version 1809, but it contains no further technical or mitigation details.

    0000092
    3.5K followersView on X
CPE platform detail23 entries

23 of 23 entries

PartVendorProductVersionTarget SWTarget HW
OSmicrosoftwindows_10_1607--x64
OSmicrosoftwindows_10_1607--x86
OSmicrosoftwindows_10_1809--x64
OSmicrosoftwindows_10_1809--x86
OSmicrosoftwindows_10_21h2--arm64
OSmicrosoftwindows_10_21h2--x64
OSmicrosoftwindows_10_21h2--x86
OSmicrosoftwindows_10_22h2--arm64
OSmicrosoftwindows_10_22h2--x64
OSmicrosoftwindows_10_22h2--x86
OSmicrosoftwindows_11_23h2--arm64
OSmicrosoftwindows_11_23h2--x64
OSmicrosoftwindows_11_24h2--arm64
OSmicrosoftwindows_11_24h2--x64
OSmicrosoftwindows_11_25h2--arm64
OSmicrosoftwindows_11_25h2--x64
OSmicrosoftwindows_server_2012---
OSmicrosoftwindows_server_2012r2--
OSmicrosoftwindows_server_2016---
OSmicrosoftwindows_server_2019---
OSmicrosoftwindows_server_2022---
OSmicrosoftwindows_server_2022_23h2---
OSmicrosoftwindows_server_2025---

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