CVE-2024-4978
Justice AV Solutions (JAVS) Viewer Installer Embedded Malicious Code Vulnerability
IN CISA KEV
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.
- Vendor
- Justice AV Solutions
- Product
- Viewer
- CVSS
- No score recorded (no NVD record loaded for this entry)
- CWE
- CWE-506
- Published
- Not recorded
- NVD modified
- Not recorded
CISA KEV
- Date added
- 2024-05-29
- Due date
- 2024-06-19
- Ransomware use
- Unknown
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS
26.9% chance of exploitation in the next 30 days (percentile 98th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.