01 Record
CVE-2025-4134
Lack of file validation in Avast Business Antivirus for Linux allows writing untrusted update files
HighPUBLISHEDCNA: NLOK
CNA base score7.3 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
02 Description
Lack of file validation in Avast Business Antivirus for Linux allows writing untrusted update files
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.21% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 12.2% of scored records. A rank, not a probability.
- NVD base score
- 7.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- NVD analysis status
- Deferred. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2025-05-28 13:53Z1 YR AGO
- Last updated
- 2025-05-28 14:06Z1 YR AGO
- Reserved
- 2025-04-30
- Assigning CNA
- NLOK
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.3)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-552Files or Directories Accessible to External PartiesBase
- Data version
- 5.1
- Document digest
- 2d04106cc7807d5f2ada64610ecc29fda5154634132a721a7b66978ff61724cd
05 Affected products
VendorProductVersionsPlatforms
06 References
- www.gendigital.comhttps://www.gendigital.com/us/en/contact-us/security-advisories/
07 Remediation
Fixed in V4.6 released 03/FEB/2025, ugrade to latest version.