# CVE-2024-34083

## Summary

- **CVE ID:** CVE-2024-34083
- **Severity:** MEDIUM
- **CVSS Score:** 5.4 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
- **CWE:** CWE-349
- **Published:** May 18, 2024
- **Last Modified:** Mar 13, 2026

## Description

aiosmptd is  a reimplementation of the Python stdlib smtpd.py based on asyncio. Prior to version 1.4.6, servers based on aiosmtpd accept extra unencrypted commands after STARTTLS, treating them as if they came from inside the encrypted connection. This could be exploited by a man-in-the-middle attack. Version 1.4.6 contains a patch for the issue.

## Affected Products

- aio-libs — aiosmtpd (< 1.4.6)

## References

- [CNA](https://github.com/aio-libs/aiosmtpd/security/advisories/GHSA-wgjv-9j3q-jhg8)
- [CNA](https://github.com/aio-libs/aiosmtpd/commit/b3a4a2c6ecfd228856a20d637dc383541fcdbfda)
- [CNA](https://nostarttls.secvuln.info)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.23%
- **EPSS Percentile:** 13.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._