#VU102997 Permissions, Privileges, and Access Controls in Microsoft Edge Update - CVE-2025-21399

Vulnerability identifier: #VU102997

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-21399

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Microsoft Edge Update
Client/Desktop applications / Other client software

Vendor: Microsoft

Description

The vulnerability allows a local  user to escalate privileges on the system.

The vulnerability exists due to improper privilege management. A local user can execute arbitrary code with SYSTEM privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Edge Update: 1.3.185.21 - 1.3.195.31

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21399

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.