CVE-2026-20844

CWE-362 — Race ConditionCWE-416 — Use After Free5 documents5 sources
Severity
7.4HIGH
EPSS
0.0%
top 93.46%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
23
Microsoft Windows 10 Version 1607Microsoft Windows 10 Version 1809Microsoft Windows 10 Version 21h2+20 more
Timeline
PublishedJan 13

Description

Use after free in Windows Clipboard Server allows an unauthorized attacker to elevate privileges locally.

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 1.4 | Impact: 5.9

Affected Packages23 packages

▶CVEListV5microsoft/windows_server_201610.0.14393.0 — 10.0.14393.8783
▶CVEListV5microsoft/windows_server_201910.0.17763.0 — 10.0.17763.8276
▶CVEListV5microsoft/windows_server_202210.0.20348.0 — 10.0.20348.4648
▶CVEListV5microsoft/windows_server_202510.0.26100.0 — 10.0.26100.32230
▶CVEListV5microsoft/windows_server_2016_(server_core_installation)10.0.14393.0 — 10.0.14393.8783

🔴Vulnerability Details

2
GHSA
GHSA-7h6f-rh5x-hw2p: Use after free in Windows Clipboard Server allows an unauthorized attacker to elevate privileges locally↗2026-01-13
▶
CVEList
Windows Clipboard Server Elevation of Privilege Vulnerability↗2026-01-13
▶

📋Vendor Advisories

1
Microsoft
Windows Clipboard Server Elevation of Privilege Vulnerability↗2026-01-13
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-20844 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-20844 (HIGH CVSS 7.4) | Use after free in Windows Clipboard | cvebase.io