CVE-2023-21766 | Windows Overlay Filter Information Disclosure Vulnerability

Windows Overlay Filter Information Disclosure Vulnerability

Published: 2023-01-10 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-21766 is rated Moderate Risk (49.6/100): CVSS Medium severity, with high exploitation likelihood (EPSS 6.44%, 91th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-21766

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-07 7.46% 6.44% -1.02%
2 2026-03-22 12.55% 7.46% -5.09%
3 2026-02-15 — 12.55% —

Full EPSS history (31 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-21766

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.7 3.1 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.0 3.6 [email protected]

Weakness enumeration for CVE-2023-21766

Affected software / configurations for CVE-2023-21766

Vendor Product Version Raw CPE
microsoft windows_10 — cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*
microsoft windows_10 20h2 cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:*
microsoft windows_10 21h2 cpe:2.3:o:microsoft:windows_10:21h2:*:*:*:*:*:*:*
microsoft windows_10 22h2 cpe:2.3:o:microsoft:windows_10:22h2:*:*:*:*:*:*:*
microsoft windows_10 1607 cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:*
microsoft windows_10 1809 cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:*
microsoft windows_11 — cpe:2.3:o:microsoft:windows_11:-:*:*:*:*:*:arm64:*
microsoft windows_11 — cpe:2.3:o:microsoft:windows_11:-:*:*:*:*:*:x64:*
microsoft windows_11 21h2 cpe:2.3:o:microsoft:windows_11:21h2:*:*:*:*:*:arm64:*
microsoft windows_11 21h2 cpe:2.3:o:microsoft:windows_11:21h2:*:*:*:*:*:x64:*
microsoft windows_11 22h2 cpe:2.3:o:microsoft:windows_11:22h2:*:*:*:*:*:arm64:*
microsoft windows_11 22h2 cpe:2.3:o:microsoft:windows_11:22h2:*:*:*:*:*:x64:*
microsoft windows_server_2016 — cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
microsoft windows_server_2019 — cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
microsoft windows_server_2022 — cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*

References for CVE-2023-21766

cvelogic Threat Intelligence