Threats / Microsoft / CVE-2022-21882
CVE-2022-21882
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Microsoft Win32k vulnerability
Microsoft Win32k contains an out-of-bounds write vulnerability enabling privilege escalation. Actively exploited in the wild.
Verdict
Today item — known-exploited.
A memory corruption flaw in Win32k allows attackers to escalate privileges on affected Windows systems. The vulnerability is being actively exploited and carries high exploitation likelihood.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Public proof-of-concept exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
8 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-02-04).
Probability (EPSS)
EPSS 0.55711 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Microsoft, Win32k. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-787 Out-of-bounds Write — weakness family: Memory safety.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
Execute code with restricted privileges on a target Windows system
Business
Attacker gains initial foothold through application or user interaction
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
Trigger the Win32k out-of-bounds write through crafted input or API calls
Business
Memory corruption occurs in kernel-mode graphics subsystem
3
Lateral reach — past segmentation narrative 3
Attacker
Escalate privileges from user-mode to kernel-mode execution context
Business
Attacker obtains SYSTEM-level access to the compromised host
4
Data at risk — exfiltration narrative 4
Attacker
Maintain persistence and execute arbitrary kernel-mode operations
Business
Complete system compromise with ability to disable security controls and deploy malware
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05