How severe is CVE-2021-25261?

CVE-2021-25261 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-25261 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25261?

CVE-2021-25261 affects Yandex Yandex Browser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-25261?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-25261 published?

CVE-2021-25261 was published on 2022-06-15 and last updated on 2026-06-17.

CVE-2021-25261

CVE-2021-25261 is a high-severity vulnerability in Yandex Yandex Browser with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-59.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-59
Affected product: Yandex Yandex Browser
Published: 2022-06-15
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-25261?: CVE-2021-25261 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-25261 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25261?: CVE-2021-25261 affects Yandex Yandex Browser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-25261?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-25261 published?: CVE-2021-25261 was published on 2022-06-15 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:yandex:yandex_browser:*:*:*:*:*:*:*:*

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