// For flags

CVE-2021-26434

Visual Studio Elevation of Privilege Vulnerability

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Visual Studio Elevation of Privilege Vulnerability

Una Vulnerabilidad de Elevación de Privilegios en Visual Studio

This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Visual Studio. 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 the Visual Studio installer. The issue results from incorrect permissions set on a resource used by the installer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.

*Credits: Michael DePlante (@izobashi) of Trend Micro's Zero Day Initiative
CVSS Scores
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
Low
Privileges Required
Low
User Interaction
Required
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
  • 2021-01-29 CVE Reserved
  • 2021-09-15 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-732: Incorrect Permission Assignment for Critical Resource
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Microsoft
Search vendor "Microsoft"
 Visual Studio 2017
Search vendor "Microsoft" for product "Visual Studio 2017"
 >= 15.0 <= 15.9
Search vendor "Microsoft" for product "Visual Studio 2017" and version " >= 15.0 <= 15.9"
-
Affected
Microsoft
Search vendor "Microsoft"
 Visual Studio 2019
Search vendor "Microsoft" for product "Visual Studio 2019"
 >= 16.0 <= 16.11
Search vendor "Microsoft" for product "Visual Studio 2019" and version " >= 16.0 <= 16.11"
-
Affected