CVE-2024-4978
CVE-2024-4978 is a high-severity vulnerability in Javs Javs Viewer with a CVSS 3.x base score of 8.4. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2024-05-29). The underlying weakness is classified as CWE-506.
Key facts
- Severity: High (CVSS 3.x base score 8.4)
- CVSS v4: 8.7
- EPSS exploit prediction: 27% (98th percentile)
- Actively exploited: Yes — listed in CISA KEV (added 2024-05-29)
- EU (EUVD) id: EUVD-2024-44535
- EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2024-05-29)
- Weakness: CWE-506
- Affected product: Javs Javs Viewer
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-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.
- How severe is CVE-2024-4978?
- CVE-2024-4978 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2024-4978 being actively exploited?
- Yes. CVE-2024-4978 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-05-29, which means active exploitation has been confirmed. It should be prioritised for remediation.
- What products are affected by CVE-2024-4978?
- CVE-2024-4978 affects Javs Javs Viewer. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2024-4978?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
- Does CVE-2024-4978 have an EU (EUVD) identifier?
- Yes. CVE-2024-4978 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-44535. It is also flagged as exploited in the EUVD (since 2024-05-29).
- When was CVE-2024-4978 published?
- CVE-2024-4978 was published on 2024-05-23 and last updated on 2026-06-17.
References
- https://twitter.com/2RunJack2/status/1775052981966377148
- https://www.javs.com/downloads/
- https://www.rapid7.com/blog/post/2024/05/23/cve-2024-4978-backdoored-justice-av-solutions-viewer-software-used-in-apparent-supply-chain-attack/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-4978
Affected products (1)
- cpe:2.3:a:javs:javs_viewer:8.3.7.250:*:*:*:*:*:*:*
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