ACTIVELY EXPLOITED
CVE-2023-40044: Progress WS_FTP Server Deserialization of Untrusted Data Vulnerability
| Vendor | Progress |
|---|---|
| Product | WS_FTP Server |
| Actively exploited | Yes |
| Added to CISA KEV | 5 Oct 2023 |
| CISA federal deadline | 26 Oct 2023 |
| Ransomware use | Known |
| Weakness (CWE) | CWE-502 |
Required action (CISA's text)
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Description (NVD)
Progress WS_FTP Server contains a deserialization of untrusted data vulnerability in the Ad Hoc Transfer module that allows an authenticated attacker to execute remote commands on the underlying operating system.
SOURCES
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Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.