CVE-2026-112016 Netcore NR256CN through 1.5.140116 Unauthenticated Write to Fixed Boa Staging Files
Remote attackers can overwrite firmware update and configuration restore staging files on Netcore NR256CN routers without authentication, leading to data tampering or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-112016?
CVE-2026-112016 is a medium-severity missing authorization vulnerability in Netcore NR256CN, published on 18 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-306
Which versions are affected by CVE-2026-112016?
How do I fix CVE-2026-112016?
No fix has been published for CVE-2026-112016 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-112016 being exploited?
There is no known exploitation of CVE-2026-112016 in the wild and no public exploit code.
Sources
Also known as GHSA-498m-g7jx-66f7.