# CVE-2026-76868: Netcore NR255-V null pointer dereference in route_policy_add.cgi

Source: https://junglewise.ai/threats/cve-2026-76868-netcore-nr255-v-null-pointer-dereference-in-route-policy-add-cgi  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-15. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-76868 · Severity: medium · CVSS 4.9 · Published 2026-09-15

The Netcore NR255-V is a network router used to manage traffic and routing policies in corporate and home networks. A null pointer dereference vulnerability in its web-based route policy configuration interface allows remote attackers with administrative access to crash the router by sending specially crafted requests, causing a denial of service and network outage.

Technologies: [Netcore NR255-V](https://junglewise.ai/threats/technologies/nr255-v). Vendors: [Netcore](https://junglewise.ai/threats/vendors/netcore).

## Quick answers

**Is CVE-2026-76868 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76868 being exploited in the wild.

**How severe is CVE-2026-76868?** Medium severity, with a CVSS score of 4.9, published 15 September 2026.

**Which products and versions are affected?** Netcore NR255-V 1.5.130703.

**Is there a fix for CVE-2026-76868?** 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-2026-76868 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-76868?** Check whether you run Netcore NR255-V 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

A null pointer dereference vulnerability exists in the route_policy_add.cgi component of Netcore NR255-V version 1.5.130703. The vulnerability is triggered when an attacker sends a request to the CGI script without the required exit_port parameter, causing the application to attempt to dereference a null pointer. The attack requires administrative privileges to access the affected interface and network connectivity to the device's web management interface. Exploitation results in a denial of service condition, crashing the affected service or device. No patch information is currently available.

## Affected products

- Netcore NR255-V 1.5.130703

## Timeline

- 2026-09-04: disclosed
- 2026-09-15: advisory

## References

- [https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-route-policy-null-deref.md](https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-route-policy-null-deref.md)
- [https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-null-pointer-dereference-in-route-policy-add-cgi-via-missing-exit-port](https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-null-pointer-dereference-in-route-policy-add-cgi-via-missing-exit-port)

## Related threats

- [Netcore NR255-V stored cross-site scripting in L7 content management](https://junglewise.ai/threats/cve-2026-92257-netcore-nr255-v-stored-cross-site-scripting-in-l7-content)
- [Netcore NR255-V sensitive information disclosure in VPN configuration handlers](https://junglewise.ai/threats/cve-2026-92256-netcore-nr255-v-sensitive-information-disclosure-in-vpn)
- [Netcore NR255-V out-of-bounds read in filter_arp_put_file.cgi](https://junglewise.ai/threats/cve-2026-92255-netcore-nr255-v-out-of-bounds-read-in-filter-arp-put-file-cgi)
- [Netcore NR255-V stored cross-site scripting in DHCP and ARP hostname fields](https://junglewise.ai/threats/cve-2026-76873-netcore-nr255-v-stored-cross-site-scripting-in-dhcp-and-arp)
- [Netcore NR255-V stored cross-site scripting in DHCP and ACL management](https://junglewise.ai/threats/cve-2026-76872-netcore-nr255-v-stored-cross-site-scripting-in-dhcp-and-acl)