{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-76852","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-08-19T21:47:08.935Z","datePublished":"2026-09-15T21:57:48.762Z","dateUpdated":"2026-09-17T16:52:31.430Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-09-15T21:57:48.762Z"},"datePublic":"2026-09-04T00:00:00.000Z","title":"Netcore NR268 1.7.121109 Forgeable Firmware Authenticity Check in mtd_write","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Improper Validation of Integrity Check Value","cweId":"CWE-354","type":"CWE"}]}],"affected":[{"vendor":"Netcore","product":"NR268","defaultStatus":"unaffected","versions":[{"version":"1.7.121109","status":"affected","versionType":"custom"}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH"}}],"references":[{"url":"https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr268-firmware-forgery.md","name":"Netcore router public references: Forgeable Firmware Authenticity Check in mtd_write","tags":["third-party-advisory"]},{"name":"VulnCheck Advisory: Netcore NR268 1.7.121109 Forgeable Firmware Authenticity Check in mtd_write","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/netcore-nr268-1.7.121109-forgeable-firmware-authenticity-check-in-mtd-write"}],"credits":[{"lang":"en","value":"Zhou Ao","type":"finder"},{"lang":"en","value":"Yin Luxing","type":"finder"},{"lang":"en","value":"Jiang Yuxuan","type":"finder"},{"lang":"en","value":"Liu Xin","type":"finder"},{"lang":"en","value":"@Nebusec","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-17T16:52:01.661088Z","id":"CVE-2026-76852","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-17T16:52:31.430Z"}}]}}