Actively exploited · CISA KEV · NVD published 2021-02-25
Actively exploitedCVE-2021-1732
Windows Win32k Elevation of Privilege Vulnerability
- First PoC
- same day →Metasploit
- 178 days →First cited attacker
Signals
- Exploited in the wild
- Yesadded 2021-11-03 · due 2021-11-17 · known ransomware use. An observation, not a forecast.
- EPSS · 30-day forecast
- 78%Chance of exploitation in the next 30 days, 100th percentile of all CVEs. A forecast; KEV outranks it.
- CVSS · NVD · HIGH
- 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Internet exposure
- not stated by sourcesNo exposure census on this CVE's dispatches.
Exploits
1 known · links onlyMetasploit1
A vulnerability exists within win32k that can be leveraged by an attacker to escalate privileges to those of NT AUTHORITY\SYSTEM. The flaw exists in how the WndExtra field of a window can be manipulated into being treated as an offset despite being populated by an attacker-controlled value. This can be leveraged to achieve an out of bounds write operation, eventually leading to privilege escalation. This flaw was originally identified as CVE-2021-
ruby · seen 2026-10-18
On the wire
0 dispatchesNo dispatch on our wire has named this CVE yet.
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