CVE-2025-21343

HIGH
2025-01-14 [email protected]
7.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 28, 2026 - 18:03 vuln.today
Patch Released
Mar 28, 2026 - 18:03 nvd
Patch available
CVE Published
Jan 14, 2025 - 18:16 nvd
HIGH 7.5

Tags

Microsoft Privilege Escalation Information Disclosure Windows 11 22h2 Windows 11 23h2 Windows 11 24h2 Windows

Description

Windows Web Threat Defense User Service Information Disclosure Vulnerability

Analysis

Windows Web Threat Defense User Service Information Disclosure Vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Improper Privilege Management vulnerability could allow attackers to escalate privileges to gain unauthorized elevated access.

Technical Context

This vulnerability is classified as Improper Privilege Management (CWE-269), which allows attackers to escalate privileges to gain unauthorized elevated access. Windows Web Threat Defense User Service Information Disclosure Vulnerability Affected products include: Microsoft Windows 11 22H2, Microsoft Windows 11 23H2, Microsoft Windows 11 24H2.

Affected Products

Microsoft Windows 11 22H2, Microsoft Windows 11 23H2, Microsoft Windows 11 24H2.

Remediation

A vendor patch is available. Apply the latest security update as soon as possible. Apply principle of least privilege, validate privilege transitions, implement proper role separation.

Priority Score

43
Low Medium High Critical
KEV: 0
EPSS: +5.4
CVSS: +38
POC: 0

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CVE-2025-21343 vulnerability details – vuln.today
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