HIGHCVSS v3.1 8.4Actively exploited · CISA KEV since 2024-05-29Vulnerability
CVE-2024-4978
Justice AV Solutions (JAVS) Viewer installer contains a malicious version of ffmpeg.exe, named fffmpeg.exe (SHA256: 421a4ad2615941b177b6ec4ab5e239c14e62af2ab07c6df1741e2a62223223c4). When run, this creates a backdoor connection to a malicious C2 server.
Properties
- Euvd product
- Viewer
- Vulnerability name
- Justice AV Solutions (JAVS) Viewer Installer Embedded Malicious Code Vulnerability
- First seen
- 2025-10-21T23:05:17+00:00
- Cvss score
- 8.4
- Epss score
- 0.26937
- Last seen
- 2026-10-19T12:00:27+00:00
- Due date
- 2024-06-19
- Euvd assigner
- cisa-cg
- Retrieved at
- 2026-10-21T01:24:47+00:00
- Exploited euvd since
- 2024-05-29T00:00:00+00:00
- Src batch id
- epss_history-20261020T103617Z-728ddd
- Source url
- https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
- Date added
- 2024-05-29
- Score
- 8.4
- Euvd base score version
- 4.0
- Fetched at
- 2026-10-20T10:36:20+00:00
- Euvd vendor
- Justice AV Solutions
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
- In Signal since
- initial import (Sep 2026)
- Euvd base score
- 8.7
Related Entities (4)
AFFECTS_PRODUCT (1)
DESCRIBES (1)
HAS_WEAKNESS (1)
INVOLVES (1)
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