CVE-2025-21399: CWE-426: Untrusted Search Path in Microsoft Microsoft Edge Update Setup
Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability
AI Analysis
Technical Summary
This vulnerability (CVE-2025-21399) affects the Microsoft Edge Update Setup component, where an untrusted search path condition could lead to elevation of privilege. The issue is categorized under CWE-426, indicating that the software improperly handles the search path for executable files, potentially allowing an attacker to execute malicious code with higher privileges. The CVSS v3.1 base score is 7.4 (high), reflecting the potential impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability, as detailed in their security advisory.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker with local access to execute code with elevated privileges, compromising system confidentiality, integrity, and availability. This could lead to full system compromise depending on the privileges gained.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21399 to remediate this vulnerability.
CVE-2025-21399: CWE-426: Untrusted Search Path in Microsoft Microsoft Edge Update Setup
Description
Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability
CVSS v3.1
Score 7.4high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2025-21399) affects the Microsoft Edge Update Setup component, where an untrusted search path condition could lead to elevation of privilege. The issue is categorized under CWE-426, indicating that the software improperly handles the search path for executable files, potentially allowing an attacker to execute malicious code with higher privileges. The CVSS v3.1 base score is 7.4 (high), reflecting the potential impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability, as detailed in their security advisory.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker with local access to execute code with elevated privileges, compromising system confidentiality, integrity, and availability. This could lead to full system compromise depending on the privileges gained.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21399 to remediate this vulnerability.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- microsoft
- Date Reserved
- 2024-12-11T00:29:48.375Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21399","vendor":"Microsoft"}]
Threat ID: 6852d15033c7acc046ee0911
Added to database: 06/18/2025, 14:46:40 UTC
Last enriched: 06/10/2026, 10:00:58 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 185
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