What’s Vulnerable › Vulnerabilities

CVE-2026-112016: Netcore NR256CN through 1.5.140116 Unauthenticated Write to Fixed Boa Staging Files

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-18 · updated 2026-10-19
• Weakness: CWE-306

Description

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-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.

Affected products

• Netcore NR256CN: through 1.5.140116

References

• https://github.com/lukadqq/netcore-router-public-refs/blob/a44d562736b41c944223297e9144d2ad7fa2aff1/2026.10.15-netcore-nr256cn-fixed-tmp-sink-write.md
• https://www.vulncheck.com/advisories/netcore-nr256cn-through-1.5.140116-unauthenticated-write-to-fixed-boa-staging-files

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