Privilege escalation in Microsoft Edge Update



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-21399
CWE-ID CWE-264
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Microsoft Edge Update
Client/Desktop applications / Other client software

Vendor Microsoft

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU102997

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 - Permissions, Privileges, and Access Controls

Exploit availability: No

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

CPE2.3 External links

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


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.



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