Vulnerability · Published Oct 18, 2026 · Assigned by VulnCheck

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

Medium 6.5

In plain English

A medium-severity missing authentication in NR256CN from Netcore. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 73.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Netcore	NR256CN	0 – through 1.5.140116

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

References

https://github.com/lukadqq/netcore-router-public-refs/blob/a44d562736b41c944223297e9144d2ad7fa2aff1/2026.10.15-netcore-nr256cn-fixed-tmp-sink-write.md technical-description, third-party-advisory
VulnCheck Advisory: Netcore NR256CN through 1.5.140116 Unauthenticated Write to Fixed Boa Staging Files third-party-advisory