CVE-2021-31951Patch(microsoft / windows_10)

LOWCVSS 7.8 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch microsoft windows_10 systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Windows Kernel Elevation of Privilege Vulnerability

microsoft CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Patch / fix

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

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

windows_10
windows_server_2016
windows_server_2019

Threat summary

Patch or workaround signal is available
2 mentions across 2 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 1 signal
General: 1 classified signal
Peaked 1d ago at 1 mentions (2026-03-06); latest day: 1
2 total mentions across 2 days

Affected systems

Vendors

microsoft

Products

windows_10windows_server_2016windows_server_2019

5 versions affected across 3 products

Deep dive

Activity timeline2 mentions / 2d

Signal classification2 categories

Patch

150.0%

General

150.0%

Referenced assets1 URL

By indicator

https://projectzero.google/2026/02/gphfh-deep-dive.html

Classification over time

Date	Total	Labels

2026-03-06	1	Patch1
2026-03-07	1	General1

Full discourse2 posts

diversenok@diversenok_zero216d
Patch
> A new Project Zero blog post by James Forshaw https://projectzero.google/2026/02/gphfh-deep-dive.html Me: Oh hey, I recognize this function! UIAccess + GetProcessHandleFromHwnd / NtUserGetWindowProcessHandle were the core of my CVE-2021-31951 EoP 😋 So some fixes leading to v3 actually date a bit earlier
Post summary
The user references a Project Zero deep‑dive post that discusses a CVE‑2021‑31951 exploitation involving UIAccess and process‑handle functions, noting that fixes were applied earlier than version 3. No PoC, exploit code, or active exploitation claims are present.
111076394.0K
1.7K followersView on X
VulnTracker@vuln_tracker216d
General
@diversenok_zero Love seeing the connections between Project Zero research and your CVE-2021-31951 work! The UIAccess + GetProcessHandleFromHwnd insights show how Windows API evolution stems from real exploit patterns. Historical perspective is invaluable.
Post summary
The tweet acknowledges the connection between Project Zero research and CVE‑2021‑31951, praising the insights on exploit patterns, but provides no technical, exploit, or patch information.
00000110
393 followersView on X

CPE platform detail7 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

7 of 7 entries

Part	Vendor	Product	Version	Target SW	Target HW
OS	microsoft	windows_10	1909	-	-
OS	microsoft	windows_10	2004	-	-
OS	microsoft	windows_10	20h2	-	-
OS	microsoft	windows_10	21h1	-	-
OS	microsoft	windows_server_2016	2004	-	-
OS	microsoft	windows_server_2016	20h2	-	-
OS	microsoft	windows_server_2019	-	-	-

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