CVE-2026-111711 — Netcore NR256CN through 1.5.140116 Pre-Auth Stack Overflow via Boa user_ok()
Netcore NR256CN through 1.5.140116 contains a pre-authentication stack overflow vulnerability in the Boa web server's user_ok() function, which copies Basic-auth usernames with …
Published: 2026-10-16 · CVSS: 9.3 · CVSS 4.0
Netcore NR256CN through 1.5.140116 contains a pre-authentication stack overflow vulnerability in the Boa web server's user_ok() function, which copies Basic-auth usernames with unbounded strcpy() calls into 64-byte stack buffers. Unauthenticated attackers can send a username longer than 63 bytes to any protected /router/*.cgi route to crash the main Boa process or potentially execute code.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7