Local Privilege Escalation in Yandex Browser for Windows
CVE-2021-25263

7.8HIGH

Key Information:

Vendor

Yandex

Status
Yandex Browser (desktop)
Vendor
CVE Published:
17 August 2021

What is CVE-2021-25263?

A local privilege escalation vulnerability exists in Yandex Browser for Windows, specifically in versions prior to 21.9.0.390. This flaw allows an attacker with low privileges to execute arbitrary code with SYSTEM privileges by exploiting insecure permissions during the browser's update process. Effective mitigation of this issue is crucial for maintaining user security and protecting sensitive data from unauthorized access.

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Deploy the Patch

Affected Version(s)

Yandex Browser (Desktop) All versions prior to version 21.9.0.390

References

https://yandex.com/bugbounty/i/hall-of-fame-browser/
x_refsource_MISC

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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