CVE-2021-36928

Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

Severity Score

6.0

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

Una Vulnerabilidad de Elevación de Privilegios en Microsoft Edge (basado en Chromium). Este ID de CVE es diferente de CVE-2021-36931.

This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Edge. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within Edge Installer. By creating a directory junction, an attacker can abuse Edge Installer to delete a file. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.

*Credits: Abdelhamid Naceri

CVSS Scores

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-07-19 CVE Reserved
2021-08-03 CVE Published
2024-08-04 CVE Updated
2024-08-29 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-59: Improper Link Resolution Before File Access ('Link Following')

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36928	2023-12-28

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Microsoft Search vendor "Microsoft"		Edge Chromium Search vendor "Microsoft" for product "Edge Chromium"				< 92.0.902.55 Search vendor "Microsoft" for product "Edge Chromium" and version " < 92.0.902.55"		-		Affected