Microsoft Edge Update Setup dropped privileges

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.0$5k-$25k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Microsoft Edge. This issue affects some unknown processing of the component Update Setup. Performing a manipulation results in Local Privilege Escalation. This vulnerability is identified as CVE-2025-21399. The attack is only possible with local access. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Microsoft Edge (affected version unknown). It has been classified as critical. This affects an unknown functionality of the component Update Setup. The manipulation with an unknown input leads to a local privilege escalation vulnerability. CWE is classifying the issue as CWE-273. The product attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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

The advisory is shared at msrc.microsoft.com. This vulnerability is uniquely identified as CVE-2025-21399 since 12/11/2024. The exploitability is told to be difficult. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 06/18/2025). MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-2459). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.1

VulDB Base Score: 7.0
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.4
CNA Vector (microsoft): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Dropped privileges
CWE: CWE-273 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/11/2024 🔍
01/17/2025 +37 days 🔍
01/17/2025 +0 days 🔍
06/18/2025 +152 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: msrc.microsoft.com
Status: Confirmed

CVE: CVE-2025-21399 (🔍)
GCVE (CVE): GCVE-0-2025-21399
GCVE (VulDB): GCVE-100-292461
EUVD: 🔍

Entryinfo

Created: 01/17/2025 21:17
Updated: 06/18/2025 18:28
Changes: 01/17/2025 21:17 (61), 01/18/2025 06:44 (2), 01/31/2025 04:04 (1), 06/18/2025 18:28 (1)
Complete: 🔍
Cache ID: 216::103

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