CVE-2021-31226: Hcc-Embedded Interniche

Critical severity, CVSS 9.8. EPSS: 3.2% chance of exploitation in the next 30 days.

An issue was discovered in HCC embedded InterNiche 4.0.1. A potential heap buffer overflow exists in the code that parses the HTTP POST request, due to lack of size validation. This vulnerability requires the attacker to send a crafted HTTP POST request with a URI longer than 50 bytes. This leads to a heap overflow in wbs_post() via an strcpy() call.

Affected products

• Hcc-Embedded Interniche: version 4.0.1 only

Published 2021-08-19. Last modified 2026-06-17.