---
id: "CVE-2026-115336"
page: "https://infrastack.ai/live/CVE-2026-115336"
kind: "vulnerability"
aliases: ["CVE-2026-115336"]
title: "WS_FTP Server: incorrect quota accounting lets uploaders exceed storage limits"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["file-transfer", "vendor", "windows", "ws_ftp-server"]
not_affected_if: ["auth-required", "no-upload-delete-users", "non-windows-hosts"]
published_at: "2026-11-09T17:17:10+00:00"
first_seen_at: "2026-11-09T17:27:38+00:00"
updated_at: "2026-11-09T17:28:56+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115336", "first_seen_at": "2026-11-09T17:27:38+00:00"}]
exploit_sources: []
---

# WS_FTP Server: incorrect quota accounting lets uploaders exceed storage limits

Link for people: https://infrastack.ai/live/CVE-2026-115336 (this .md is for agents)

WS_FTP Server releases before 2025.0.5 on Windows miscount storage quotas. An authenticated user with upload and delete permissions can push past their quota, which can cause a denial of service.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed WS_FTP Server version in the product's admin console or installation folder; versions below `2025.0.5` are in the affected range.
- Review which accounts hold upload and delete permissions.

## Fix

- WS_FTP Server: move to `2025.0.5` or later.

## Timeline

- 2026-11-09T17:27:38+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-115336

## From the sources

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.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_