CVEvulnerability

CVE-2026-41429

8.8 HIGH Published 2026-04-24 Modified 2026-10-26 Official page ↗
Status
Analyzed
Published
2026-04-24
Last modified
2026-10-26
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.8 HIGH — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-121

Description

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.

Affected configurations

• espressif arduino-esp32 (< 3.3.8)

Related

Weakness · CWE (1)

  • CWE-121 Stack-based Buffer Overflow weakness

References