Is CVE-2026-76870 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-76870?

CVE-2026-76870 has a CVSS v3 severity of HIGH (7.1).

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CVE-2026-76870

Description

Netcore NR255-V version 1.5.130703 contains an out-of-bounds read vulnerability in the mtd_write pre-flash validation routine triggered by short firmware uploads. Attackers can upload a truncated firmware image via put_file_cgi.c to trigger out-of-bounds reads across main.c, check_image_uuid.c, and oemMD5Update.c.