CVE-2024-50623: in the CISA KEV catalogue
Cleo Multiple Products Unrestricted File Upload Vulnerability. CISA added CVE-2024-50623 to the Known Exploited Vulnerabilities catalogue on 2024-12-13 with a default due date of 2025-01-03. Known ransomware campaign use: Known. Forensic triage flag: No.
Cleo Harmony, VLTrader, and LexiCom, which are managed file transfer products, contain an unrestricted file upload and download vulnerability that can lead to remote code execution with elevated privileges. (CISA description)
- Vendor / product
- Cleo Multiple Products
- CWE
- CWE-434
- CISA required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS
- 99%, percentile 99 (scored 2026-11-03)
EPSS puts about 99 in 100 odds (99%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 99% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2024-50623 in the CISA KEV catalogue?
Yes. CISA added CVE-2024-50623 (Cleo Multiple Products Unrestricted File Upload Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2024-12-13. CISA's default due date for it is 2025-01-03.
Is CVE-2024-50623 used in ransomware attacks?
CISA marks known ransomware campaign use as Known for CVE-2024-50623.
What should I do about CVE-2024-50623?
CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2024-50623