CVE-2026-76870CWE-125

CVE-2026-76870

High · published September 16, 2026

CVSS v3.1
7.1
EPSS
0%
Percentile
33.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00404 · 33.5th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2026-09-16T02:17Z
References (2)
https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-firmware-upload-oob.md · [email protected]https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-out-of-bounds-read-in-mtd-write-firmware-upload-validation · [email protected]
EPSS history
Timeline
  • 17 SEP 03:32Z
    EPSS moved — → 0%
    epss
  • 15 SEP 21:58Z
    Netcore NR255-V 1.5.130703 Out-of-Bounds Read in mtd_write Firmware Upload Validation
    cvelistv5