PT-2026-35072 · Espressif · Arduino-Esp32

Published 2026-04-24 · Updated 2026-04-24 · CVE-2026-41429

NVD

CVSS v3.1

8.8

High

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

arduino-esp32 is an Arduino core for the ESP32, ESP32-S2, ESP32-S3, ESP32-C3, ESP32-C6 and ESP32-H2 microcontrollers. Prior to 3.3.8, there is a remotely reachable memory corruption issue in the NBNS packet handling path. When NetBIOS is enabled by calling NBNS.begin(...), the device listens on UDP port 137 and processes untrusted NBNS requests from the local network. The request parser trusts the attacker-controlled name len field without enforcing a bound consistent with the fixed-size destination buffers used later in the flow. This vulnerability is fixed in 3.3.8.

Fix

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2026-41429

Affected Products

Arduino-Esp32

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-41429 · Security Note
• https://github.com/espressif/arduino-esp32/security/advisories/GHSA-92j9-c75g-2c5f · Note