CVE-2021-25255: Yandex Browser Lite for Android prior to version 21.1.0 allows remote attackers to cause a denial of service.

Q: How do I fix CVE-2021-25255?

yandex browser: upgrade to 21.1.0. Exact commands for each OS are on this page.

Q: Is CVE-2021-25255 being exploited?

CVE-2021-25255 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-25255 affect?

CVE-2021-25255 affects yandex browser. Severity is high (CVSS 7.5). Yandex Browser Lite for Android prior to version 21.1.0 allows remote attackers to cause a denial of service.

Q: How urgent is CVE-2021-25255?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2021-25255 is a high-severity flaw (CVSS 7.5) affecting yandex browser. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Yandex Browser Lite for Android prior to version 21.1.0 allows remote attackers to cause a denial of service.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-20
Published	2025-05-21
Last modified	2026-06-17

Publisher (CNA): Yandex N.V. · Vendor: yandex

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-05-21 07:16 UTCPublished CVE record published
2026-06-17 03:41 UTCUpdated Record last modified

yandex yandex browser UPGRADE

Affected: < 21.1.0

Fixed in: 21.1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy yandex-browser || rpm -q yandex-browser || yandex-browser --version

2. UPGRADE to 21.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade yandex-browser

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade yandex-browser

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-25255?

yandex browser: upgrade to 21.1.0. Exact commands for each OS are on this page.

Is CVE-2021-25255 being exploited?

CVE-2021-25255 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-25255 affect?

CVE-2021-25255 affects yandex browser. Severity is high (CVSS 7.5). Yandex Browser Lite for Android prior to version 21.1.0 allows remote attackers to cause a denial of service.

How urgent is CVE-2021-25255?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

Software pages

Android vulnerabilities

Related CVEs

CVE-2024-6473 HIGH 7.8 UPGRADE Yandex Browser for Desktop before 24.7.1.380 has a DLL Hijacking Vulnerability because an untrusted search pat
CVE-2023-26226 CRITICAL 9.8 UPGRADE A use after free memory corruption issue exists in Yandex Browser for Desktop prior to version 24.4.0.682
CVE-2021-25262 MEDIUM 5.4 UPGRADE Yandex Browser for Android prior to version 21.3.0 allows remote attackers to perform IDN homograph attack.
CVE-2021-25254 MEDIUM 5.3 UPGRADE Yandex Browser Lite for Android before 21.1.0 allows remote attackers to spoof the address bar.

References

← Back to latest CVEs