Quick answers
- Is CVE-2026-112016 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-112016 being exploited in the wild.
- How severe is CVE-2026-112016?
- Medium severity, with a CVSS score of 6.5, published 18 October 2026.
- Which products and versions are affected?
- Netcore NR256CN through 1.5.140116.
- Is there a fix for CVE-2026-112016?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-112016 attacked?
- It is attacked over the network, in device firmware.
- Am I affected by CVE-2026-112016?
- Check whether you run Netcore NR256CN at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The Boa-derived web server in the NR256CN firmware accepts arbitrary .cgi pathnames without validation and routes POST bodies to fixed predictable temporary files (/tmp/boa_temp.update or /tmp/boa_temp.para) based on substring matching in the pathname. An unauthenticated remote attacker can send crafted HTTP POST requests to non-existent CGI endpoints to write attacker-controlled data into these staging files, enabling tampering with firmware updates, configuration restores, or denial of service.
Affected products
- Netcore NR256CN through 1.5.140116
Timeline
- 2026-10-16: disclosed
- 2026-10-18: advisory