CVE-2026-112016

MEDIUM 6.5

Netcore NR256CN through 1.5.140116 Unauthenticated Write to Fixed Boa Staging Files

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-306
Vendor	netcore
Product	nr256cn
Published	Oct 18, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

Affected Versions

Netcore / NR256CN

0 ≤ 1.5.140116

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Zhou Ao Yin Luxing Lu Fangzhou Liu Xin