CVE-2025-4134

HIGH

Published May 28, 2025 Modified Apr 15, 2026 CWE-552

Description

Lack of file validation in do_update_vps in Avast Business Antivirus for Linux 4.5 on Linux allows local user to spoof or tamper with the update file via an unverified file write.

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CVSS v3.1 Score

7.3

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-552 CWE-552

References

Other References

https://www.gendigital.com/us/en/contact-us/security-advisories/

Frequently Asked Questions

What is CVE-2025-4134? +

Lack of file validation in do_update_vps in Avast Business Antivirus for Linux 4.5 on Linux allows local user to spoof or tamper with the update file via an unverified file write. It has a CVSS v3.1 base score of 7.3 (HIGH).

How severe is CVE-2025-4134? +

CVE-2025-4134 has a CVSS v3.1 score of 7.3 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2025-4134? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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