CVE-2025-55696 — Time-of-check Time-of-use (TOCTOU) Race Condition in Microsoft Windows 10 Version 1809

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race ConditionCWE-822 — Untrusted Pointer Dereference4 documents4 sources
Severity
7.0HIGHNVD
CNA7.8
EPSS
0.0%
top 91.40%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
19
Microsoft Windows 10 Version 1809Microsoft Windows 10 Version 21h2Microsoft Windows 10 Version 22h2+16 more
Timeline
PublishedOct 14

Description

Time-of-check time-of-use (toctou) race condition in NtQueryInformation Token function (ntifs.h) allows an authorized attacker to elevate privileges locally.

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.0 | Impact: 5.9

Affected Packages19 packages

▶NVDmicrosoft/windows< 10.0.17763.7919+3
▶NVDmicrosoft/windows_10_1809< 10.0.17763.7919
▶NVDmicrosoft/windows_10_21h2< 10.0.19044.6456
▶NVDmicrosoft/windows_10_22h2< 10.0.19045.6456
▶NVDmicrosoft/windows_11_22h2< 10.0.22621.6060

🔴Vulnerability Details

2
GHSA
GHSA-fc47-mqrj-q8w9: Time-of-check time-of-use (toctou) race condition in NtQueryInformation Token function (ntifs↗2025-10-14
▶
CVEList
NtQueryInformation Token function (ntifs.h) Elevation of Privilege Vulnerability↗2025-10-14
▶

📋Vendor Advisories

1
Microsoft
NtQueryInformation Token function (ntifs.h) Elevation of Privilege Vulnerability↗2025-10-14
▶
CVE-2025-55696 — Microsoft vulnerability | cvebase