CVE-2026-41429
HIGH
MEDIUM
Priority: 0.03
BB Relevance:
63/100
Published: 2026-04-24
Modified: 2026-10-26
First seen: 2026-10-29
Status: active
Attack Surface
Adjacent
Low Complexity
No Auth
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Adjacent
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
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.
Weakness Classification (1)
Affected Software (1)
| Vendor | Product | Version |
|---|---|---|
| espressif | arduino-esp32 | < 3.3.8 |
References & Advisories (1)
Exploit
Vendor Advisory