CVE-2025-4134

HIGH
2025-05-28 [email protected]
7.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 28, 2026 - 18:44 vuln.today
CVE Published
May 28, 2025 - 14:15 nvd
HIGH 7.3

Tags

Information Disclosure Path Traversal

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.

Analysis

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. Rated high severity (CVSS 7.3), this vulnerability is low attack complexity. No vendor patch available.

Technical Context

This vulnerability is classified under CWE-552. 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.

Affected Products

Avast Business Antivirus for Linux 4.5 on Linux.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Priority Score

37
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +36
POC: 0

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CVE-2025-4134 vulnerability details – vuln.today
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