CVE-2026-76870 Netcore NR255-V 1.5.130703 Out-of-Bounds Read in mtd_write Firmware Upload Validation

Netcore NR255-V version 1.5.130703 contains an out-of-bounds read vulnerability in the mtdwrite pre-flash validation routine triggered by short firmware uploads. Attackers can upload a truncated firmware image via putfilecgi.c to trigger out-of-bounds reads across main.c, checkimageuuid.c, and...

CVE-2026-76852: Improper Validation of Integrity Check Value

Netcore NR268 firmware version 1.7.121109 has an improper integrity verification flaw in mtdwrite allowing forged firmware authenticity checks. Attackers can exploit putfile.cgi and checkimageuuid.c to bypass firmware signature validation and load unauthorized firmware images...