CVE-2026-115336
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Incorrect Quota Accounting in WS_FTP Server Allows DoS

Publication date: 2026-11-09

Last updated on: 2026-11-09

Assigner: Progress Software Corporation

Description
Incorrect quota accounting in Progress Software WS_FTP Server releases prior to 2025.0.5 on Windows could allow an authenticated user with upload and delete permissions to exceed storage quotas, potentially causing denial of service.

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Meta Information

Published
2026-11-09
Last Modified
2026-11-09
Generated
2026-11-09
AI Q&A
2026-11-09
EPSS Evaluated
N/A
NVD
CVE-2026-115336
EUVD
EUVD-2026-120110

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Progress Software WS_FTP Server From 2025.0.0 (inc) to 2025.0.5 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-682 The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management.

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Executive Summary

This vulnerability involves incorrect quota accounting in Progress Software WS_FTP Server versions before 2025.0.5 on Windows. An authenticated user with upload and delete permissions can exploit this to exceed storage quotas, potentially leading to a denial of service by consuming excessive server resources.

Detection Guidance

To detect this vulnerability, monitor WS_FTP Server logs for unusual storage quota usage or excessive file operations by authenticated users with upload and delete permissions. Check for abnormal disk space consumption on the server hosting WS_FTP.

Impact Analysis

If you use WS_FTP Server prior to 2025.0.5, an attacker with valid credentials could fill up server storage, disrupting services for all users. This may cause downtime, data loss, or prevent legitimate file operations.

Compliance Impact

This vulnerability could impact compliance with GDPR and HIPAA by enabling unauthorized storage quota exceedances, potentially leading to data integrity issues or denial of service. Exceeding quotas may result in improper data handling or loss, which could violate GDPR principles of data integrity and availability or HIPAA requirements for safeguarding protected health information.

Mitigation Strategies

Update Progress Software WS_FTP Server to version 2025.0.5 or later to address the quota accounting issue. Ensure only authorized users have upload and delete permissions to prevent misuse.

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