CVE-2025-4134
Lack of file validation in Avast Business Antivirus for Linux allows writing untrusted update files
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 7.3EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
28 May 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Affected products
Avast · Avast Business AntivirusWant to know if your infrastructure is exposed to this?
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