Skip to content
Fencer Vulns
medium 4.7

CVE-2023-21766 json

Windows Overlay Filter Information Disclosure Vulnerability

published 2023-01-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-25933

cvss
4.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

Windows Overlay Filter Information Disclosure Vulnerability

Patch / fix

  • Microsoft Windows 10 Version 1809 10.0.17763.3887
  • Microsoft Windows Server 2019 10.0.17763.3887
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.3887
  • Microsoft Windows Server 2022 10.0.20348.1487
  • Microsoft Windows 10 Version 20H2 10.0.19042.2486
  • Microsoft Windows 11 version 21H2 10.0.22000.1455
  • Microsoft Windows 10 Version 21H2 10.0.19044.2486
  • Microsoft Windows 10 Version 1507 10.0.10240.19685
  • Microsoft Windows 10 Version 1607 10.0.14393.5648
  • Microsoft Windows Server 2016 10.0.14393.5648
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.5648
  • Microsoft Windows 10 Version 22H2 10.0.19045.2486
  • Microsoft Windows 11 version 22H2 10.0.22621.1105

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.90% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
CNA 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

  • Microsoft Windows 10 Version 1809
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows Server 2022
  • Microsoft Windows 10 Version 20H2
  • Microsoft Windows 11 version 21H2
  • Microsoft Windows 10 Version 21H2
  • Microsoft Windows 10 Version 1507
  • Microsoft Windows 10 Version 1607
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2016 (Server Core installation)
  • Microsoft Windows 10 Version 22H2
  • Microsoft Windows 11 version 22H2

Classification

Weakness
  • CWE-591 Sensitive Data Storage in Improperly Locked Memory
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.