Vulnerability details

CVE-2026-76852

Netcore NR268

Netcore NR268 1.7.121109 Forgeable Firmware Authenticity Check in mtd_write

CVSS 4.0

8.7High

Official description

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.

CVSS scores

Score	Version	Source	Vector
8.7High	4.0	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`
8.8High	3.1	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
Netcore	NR268	1.7.121109	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr268-firmware-forgery.md third-party-advisory
https://www.vulncheck.com/advisories/netcore-nr268-1.7.121109-forgeable-firmware-authenticity-check-in-mtd-write third-party-advisory

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Details

Published: 2026-09-16
Last updated: 2026-09-17
State: Published
Assigner (CNA): VulnCheck

Exploit prediction (EPSS)

0.27%

Probability of exploitation in 30 days

19.3%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-354
Improper Validation of Integrity Check Value