CVE-2026-115339 PUBLISHED

Unauthenticated XFT Memory Exhaustion in Progress WS_FTP Server

Assigner: ProgressSoftware
Reserved: 22.10.2026 Published: 09.11.2026 Updated: 09.11.2026

Insufficient resource limits in Progress Software WS_FTP Server releases prior to 2025.0.5 on Windows could allow an unauthenticated remote attacker to cause denial of service.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Progress Software
Product	WS_FTP Server
Versions	Default: unaffected affected from 0 to 2025.0.5 (excl.)

Workarounds

Reduce XFT service message-size and array-size limits to the minimum required for normal transfers. Contact Progress Software Technical Support for guidance on configuring these limits.

Credits

Niv Levy (restricted) finder

References

https://community.progress.com/s/article/WS-FTP-Server-Service-Pack-November-2026

Problem Types

CWE-770: Allocation of Resources Without Limits or Throttling CWE

Impacts

Excessive Allocation - unauthenticated requests can consume service memory.