High 8.4Known exploited (CISA KEV)Published May 23, 2024

CVE-2024-4978Malicious Code in Justice AV Solutions (JAVS) Viewer

Updated under an hour ago (2026-10-19 11:10 UTC)

Does this affect you?

It affects Justice AV Solutions Viewer and 2 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since May 29, 2024; federal agencies had to remediate by Jun 19, 2024. Treat that date as your deadline.

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Every CVE for Justice AV Solutions Viewer

Exploited in the last 30 days

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.

CVSS: 8.4 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-506
Known exploited: Added to CISA KEV May 29, 2024; federal remediation due Jun 19, 2024Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 26.94% (percentile 98)
Assigned by: cisa-cg
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Justice AV Solutions Viewer justice_av_solutions:viewer (from the name)	8.3.7.250	CNA record
javs viewer javs:viewer	8.3.7.250	CISA ADP
javs javs_viewer javs:javs_viewer	8.3.7.250	NVD

References

https://twitter.com/2RunJack2/status/1775052981966377148third-party-advisory
https://www.rapid7.com/blog/post/2024/05/23/cve-2024-4978-backdoored-justice-av-solutions-viewer-software-used-in-apparent-supply-chain-attack/exploit, third-party-advisory
https://www.javs.com/downloads/broken-link, product
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-4978us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.