{"id":"CVE-2026-112016","title":"Netcore NR256CN through 1.5.140116 Unauthenticated Write to Fixed Boa Staging Files","summary":"Netcore NR256CN through 1.5.140116 contains an unauthenticated file write vulnerability in the Boa-derived /bin/boa web server that allows remote attackers to overwrite update and restore staging files. Attackers can POST to a non-existe…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","cvssSource":"cna","cwe":["CWE-306"],"vendor":"Netcore","product":"NR256CN","affected":["NR256CN <= 1.5.140116"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T11:38:37.119Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112016","references":[{"url":"https://github.com/lukadqq/netcore-router-public-refs/blob/a44d562736b41c944223297e9144d2ad7fa2aff1/2026.10.15-netcore-nr256cn-fixed-tmp-sink-write.md"},{"url":"https://www.vulncheck.com/advisories/netcore-nr256cn-through-1.5.140116-unauthenticated-write-to-fixed-boa-staging-files","label":"VulnCheck Advisory: Netcore NR256CN through 1.5.140116 Unauthenticated Write to Fixed Boa Staging Files"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T11:40:26.621Z","slug":"CVE-2026-112016","body":"## Overview\n\nNetcore NR256CN through 1.5.140116 contains an unauthenticated file write vulnerability in the Boa-derived /bin/boa web server that allows remote attackers to overwrite update and restore staging files. Attackers can POST to a non-existent .cgi pathname to write attacker-controlled content into /tmp/boa_temp.update or /tmp/boa_temp.para, tampering with pending firmware updates or configuration restores or causing denial of service.\n\n## Affected\n\n- `NR256CN <= 1.5.140116`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}