CVE-2026-41429
8.8 · HIGHOverview
CVE-2026-41429 is a high-severity vulnerability affecting espressif arduino-esp32. It was published on April 24, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from espressif. Update arduino-esp32 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| espressif | arduino-esp32 | >= 0, < 3.3.8 | Affected |
Frequently Asked Questions
What is CVE-2026-41429?
CVE-2026-41429 is a high-severity vulnerability affecting espressif arduino-esp32. It was published on April 24, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).
How severe is CVE-2026-41429?
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-41429?
Check the references section for vendor advisories and patches from espressif. Update arduino-esp32 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-41429?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-41429 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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