{"id":"CVE-2024-4978","aliases":["EUVD-2024-44535","GHSA-wf54-f8v9-v72v"],"status":"published","title":"Malicious Code in Justice AV Solutions (JAVS) Viewer","description":"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.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.26937,"percentile":0.98052,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"cwes":["CWE-502","CWE-506"],"published":"2024-05-23T01:56:37Z","modified":"2026-06-17T08:03:19Z","kev":{"date_added":"2024-05-29","due_date":"2024-06-19","required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2024-05-29"},{"source":"kev","since":"2024-05-29"}],"products":[{"vendor":"javs","product":"javs_viewer"},{"vendor":"javs","product":"viewer"},{"vendor":"justice av solutions","product":"viewer"}],"references":[{"url":"https://twitter.com/2RunJack2/status/1775052981966377148","tags":["x_transferred","Third Party Advisory"]},{"url":"https://www.rapid7.com/blog/post/2024/05/23/cve-2024-4978-backdoored-justice-av-solutions-viewer-software-used-in-apparent-supply-chain-attack/","tags":["x_transferred","Exploit","Third Party Advisory"]},{"url":"https://www.javs.com/downloads/","tags":["x_transferred","Broken Link","Product"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-4978","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-4978"},{"url":"https://www.javs.com/downloads"},{"url":"https://www.rapid7.com/blog/post/2024/05/23/cve-2024-4978-backdoored-justice-av-solutions-viewer-software-used-in-apparent-supply-chain-attack"},{"url":"https://github.com/advisories/GHSA-wf54-f8v9-v72v"}],"sources":{"cve":[{"id":"CVE-2024-4978","title":"Malicious Code in Justice AV Solutions (JAVS) Viewer","description":"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.","status":"published","published":"2024-05-23T01:56:37.946Z","modified":"2025-10-21T23:05:17.733Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"high","assessor":"cna"},{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-506"],"updated_at":"2026-11-02T14:34:16.78507Z"}],"euvd":[{"id":"EUVD-2024-44535","description":"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.","status":"published","published":"2024-05-23T01:56:37Z","modified":"2025-10-21T23:05:17Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"high"}],"exploited_since":"2024-05-29","updated_at":"2026-11-02T20:31:28.525814Z"}],"ghsa":[{"id":"GHSA-wf54-f8v9-v72v","title":"Justice AV Solutions Viewer Setup 8.3.7.250-1 contains a malicious binary when executed and is...","description":"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.","status":"published","published":"2024-05-23T03:30:41Z","modified":"2025-10-22T00:33:04Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-502","CWE-506"],"updated_at":"2026-11-02T15:04:07.67458Z"}],"kev":[{"id":"CVE-2024-4978","title":"Justice AV Solutions (JAVS) Viewer Installer Embedded Malicious Code Vulnerability","description":"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.","cwes":["CWE-506"],"kev":{"date_added":"2024-05-29","due_date":"2024-06-19","required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:16.234141Z"}],"nvd":[{"id":"CVE-2024-4978","description":"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.","status":"published","published":"2024-05-23T02:15:09.257Z","modified":"2026-06-17T08:03:19.347Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-506"],"updated_at":"2026-11-02T14:10:01.327642Z"}]}}