CVE-2026-111711Critical· 9.8▾ MidnightNetcore 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. Unauthe…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
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.
NR256CN <= 1.5.140116Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-111710High· 7.5Netcore NR256CN through 1.5.140116 Boa Web Server NULL Pointer Dereference DoS
CVE-2026-111712Medium· 6.5Netcore NR256CN through 1.5.140116 Authentication Bypass via CGI Path Prefix
CVE-2026-101074Critical· 9.8A weakness has been identified in Netcore NR289-GE 1.4.5102
CVE-2026-76869High· 7.2Netcore NR255-V version 1.5.130703 contains a stack-based buffer overflow in reboot_timer_set.cgi caused by improper sscanf token parsing
CVE-2026-76861High· 8.8Netcore NR255-V version 1.5.130703 contains a stack-based buffer overflow in ntools_tcpdump_start_set.cgi caused by an unsized sprintf call when processing form values
CVE-2026-76860High· 8.8Netcore NR255-V version 1.5.130703 contains a stack-based buffer overflow in wake_up_set.cgi caused by unbounded tokenization of MAC and ID input