AEGLIX vulnerability intelligence
CVE-2021-40449
HIGH · CVSS 7.8 · Analyzed
Published: 2021-10-13 · Updated: 2026-06-17 · Source: NVD
Vulnerability overview
Win32k Elevation of Privilege Vulnerability
Severity and scoring
- CVSS score
- 7.8 · HIGH
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-416
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Microsoft · Windows
- Added to catalog
- 2021-11-17
- Required action
- Apply updates per vendor instructions.
- CISA remediation due date
- 2021-12-01
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.10240.19086
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.14393.4704
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.17763.2237
cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.18363.1854
cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.19041.1288
cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.19041.1288
cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.19041.1288
cpe:2.3:o:microsoft:windows_11:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.22000.258
cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.19041.1288
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.14393.4704
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.17763.2237
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.20348.288
cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.19042.1288
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- http://packetstormsecurity.com/files/164926/Win32k-NtGdiResetDC-Use-After-Free-Local-Privilege-Escalation.html
Exploit · Third Party Advisory · VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40449
Patch · Vendor Advisory
- http://packetstormsecurity.com/files/164926/Win32k-NtGdiResetDC-Use-After-Free-Local-Privilege-Escalation.html
Exploit · Third Party Advisory · VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40449
Patch · Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40449
US Government Resource