Vulnerability in Netcore Nr268
CVE-2026-76852
Netcore NR268 firmware version 1.7.121109 has an improper integrity verification flaw in mtd_write allowing forged firmware authenticity checks. Attackers can exploit put_file.cgi and check_image_uuid.c to bypass firmware signature validation and load unauthorized firmware images.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (19.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Netcore Nr268 — versions 1.7.121109
Weakness classification (CWE)
References
- github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr2… (third-party-advisory)
- www.vulncheck.com/advisories/netcore-nr268-1.7.121109-forgeable-firmware-authen… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-76852?
- CVE-2026-76852 is a high-severity vulnerability in Netcore Nr268, classified under Improper Validation of Integrity Check Value. CVSS score: 8.8/10. Published 2026-09-15.
- How severe is CVE-2026-76852?
- High severity. CVSS v3 base score is 8.8 out of 10.