Vulnerability · CVE-2024-4978
Justice AV Solutions (JAVS) Viewer Installer Embedded Malicious Code Vulnerability
Published May 22, 2024 · catalog updated Jun 17, 2026 · Justice AV Solutions Viewer
Patch now
CVE-2024-4978 is in the CISA known-exploited catalog, due Jun 19, 2024. Confirm Justice AV Solutions Viewer against the vendor advisory and apply that fix. The CVSS score does not change the priority.
- Severity
- High8.7
- Known exploitation
- CISA KEV and VulnCheck KEV
- EPSS
- 26.94%
- Remediation
- Remediation guidance
- Affected products
- cpe javs/javs viewer · vendor Justice AV Solutions Viewer
Justice AV Solutions Viewer Setup 8.3.7.250-1 contains a malicious binary when executed and is signed with an unexpected authenticode signature. A remote, privileged threat actor may exploit this vulnerability to execute of unauthorized PowerShell commands.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe javs/javs viewer8.3.7.250
- vendor Justice AV Solutions Viewerversion unspecified
How to fix CVE-2024-4978
Recommended remediation
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. CISA due date Jun 19, 2024.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2024-4978 is in the CISA known-exploited catalog, due Jun 19, 2024. Confirm Justice AV Solutions Viewer against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Which versions are affected?
Compare what you have installed with javs/javs viewer 8.3.7.250. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
What should an analyst verify?
CWE-506. EPSS 26.94%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
May 22, 2024 · Catalog
Detected
Justice AV Solutions Viewer Setup 8.3.7.250-1 contains a malicious binary when executed and is signed with an unexpected authenticode signature. A remote, privileged threat actor may exploit this vulnerability to execute of unauthorized PowerShell commands.
May 29, 2024 · CISA KEV
Known exploited
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Jun 19, 2024 · CISA KEV
Remediation due
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Jun 17, 2026 · Catalog
Updated
Justice AV Solutions Viewer Setup 8.3.7.250-1 contains a malicious binary when executed and is signed with an unexpected authenticode signature. A remote, privileged threat actor may exploit this vulnerability to execute of unauthorized PowerShell commands.
Sources
- CISA KEVConfirmed exploitationCVE-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.
cisa.gov - CVE.orgVulnerability recordCVE-2024-4978
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2024-4978
30-day exploitation probability 26.9%
first.org - NIST NVDVulnerability recordCVE-2024-4978
Justice AV Solutions Viewer Setup 8.3.7.250-1 contains a malicious binary when executed and is signed with an unexpected authenticode signature. A remote, privileged threat actor may exploit this vulnerability to execute of unauthorized PowerShell commands.
nvd.nist.gov - VulnCheck KEVConfirmed exploitationCVE-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.
vulncheck.com
References
Freshness
Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.