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CVE-2023-4257

CriticalPublished

Unchecked user input length in the Zephyr WiFi shell module

Published: Oct 13, 2023
Updated: Feb 13, 2025
Assigning CNA: zephyr
Evidence observed: Aug 28, 2026

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

0.9%

Low · next 30 days

Percentile: 56.7%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Unchecked user input length in /subsys/net/l2/wifi/wifi_shell.c can cause buffer overflows.

Sources

advisoriesInformational
A collection of my public security advisories.
vulnsResearch
HN Security's advisories.

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