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CVE-2021-25263

HIGH
7.8
CVSS Score
Published: August 17, 2021 at 06:34 PM UTC
Updated: June 17, 2026 at 03:41 AM UTC
1 product affected across 1 vendorYandex Browser

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Severity
HIGH7.8
Exploit prediction
EPSS 0.4%

Description

Local privilege vulnerability in Yandex Browser for Windows prior to 21.9.0.390 allows a local, low privileged, attacker to execute arbitary code with the SYSTEM privileges through manipulating files in directory with insecure permissions during Yandex Browser update process.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Yandex Browser· Yandex
95%
v < 21.9.0.390
Affected range stops below 21.9.0.390, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCVendor Advisory
Source: [email protected]
https://yandex.com/bugbounty/i/hall-of-fame-browser/

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-732

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