What is CVE-2021-25261?

CVE-2021-25261 is a high-severity vulnerability in Microsoft Windows, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2022-06-15.

How severe is CVE-2021-25261?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Microsoft Windows

CVE-2021-25261

Local privilege vulnerability in Yandex Browser for Windows prior to 22.5.0.862 allows a local, low privileged, attacker to execute arbitary code with the SYSTEM privileges through manipulating symlinks to installation file during Yandex Browser update process.

Published 2022-06-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (37.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Microsoft Windows
Yandex Browser
Yandex Browser (Desktop) — versions All versions prior to version 22.5.0.862

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

yandex.com/bugbounty/i/hall-of-fame-browser/ (Vendor Advisory)

Frequently asked questions

What is CVE-2021-25261?: CVE-2021-25261 is a high-severity vulnerability in Microsoft Windows, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2022-06-15.
How severe is CVE-2021-25261?: High severity. CVSS v3 base score is 7.8 out of 10.