What is the CVSS score of CVE-2025-21399?

CVE-2025-21399 has a CVSS 3.1 base score of 7.4 (High). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Which versions of Edge Update are affected by CVE-2025-21399?

CVE-2025-21399 presents moderate security risk rated CVSS 7.4. Exploitation could compromise the security of affected deployments.

Is there a public PoC exploit available for CVE-2025-21399?

Yes, a public proof-of-concept exploit is available for CVE-2025-21399. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2025-21399?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Edge Update CVE-2025-21399

HIGH

Untrusted Search Path (CWE-426)

2025-01-17 secure@microsoft.com

Microsoft Information Disclosure Google Edge Update Chrome

7.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.4 HIGH

AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:04 vuln.today

PoC Detected

Jul 03, 2025 - 11:22 vuln.today

Public exploit code

CVE Published

Jan 17, 2025 - 20:15 nvd

HIGH 7.4

DescriptionCVE.org

Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability

AnalysisAI

Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.4), this vulnerability is no authentication required. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-426. Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability Affected products include: Microsoft Edge Update.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.