# CVE-2026-94101: Netcore NBR200V2 buffer overflow in routerd VLAN handler

Source: https://junglewise.ai/threats/cve-2026-94101-a-security-vulnerability-has-been-detected-in-netcore-nbr200v2-1  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-21. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-94101 · Severity: critical · CVSS 9.9 · Published 2026-09-21

Netcore NBR200V2 is a network router device used to manage corporate and home networks. A buffer overflow vulnerability in its routing daemon allows remote attackers to crash the device or execute arbitrary code by sending specially crafted network requests, potentially leading to network outage or complete system compromise.

Technologies: [Netcore NBR200V2](https://junglewise.ai/threats/technologies/nbr200v2). Vendors: [Netcore](https://junglewise.ai/threats/vendors/netcore).

## Quick answers

**Is CVE-2026-94101 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-94101 being exploited in the wild.

**How severe is CVE-2026-94101?** Critical severity, with a CVSS score of 9.9, published 21 September 2026.

**Which products and versions are affected?** Netcore NBR200V2 1.3.241127.071246.

**Is there a fix for CVE-2026-94101?** 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-2026-94101 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-94101?** Check whether you run Netcore NBR200V2 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 vlan_load_form_uci function in /usr/bin/routerd contains a stack-based buffer overflow triggered by an unsanitized wan_num argument. The vulnerability is remotely exploitable without authentication and has been publicly disclosed with working exploits available.

## Affected products

- Netcore NBR200V2 1.3.241127.071246

## Timeline

- 2026-09-21: disclosed
- other: Vendor did not respond to early disclosure notification

## References

- [https://app.notion.com/p/Netcore-NBR200V2-Vul-9-39f797159f1580668db9e8df031dbdd5](https://app.notion.com/p/Netcore-NBR200V2-Vul-9-39f797159f1580668db9e8df031dbdd5)
- [https://vuldb.com/cve/CVE-2026-94101](https://vuldb.com/cve/CVE-2026-94101)

## Related threats

- [Netcore NBR200V2 authenticated command injection in Tools Ping](https://junglewise.ai/threats/cve-2026-101002-a-security-flaw-has-been-discovered-in-netcore-nbr200v2-1-3)
- [Netcore NBR200V2 command injection in network_tools](https://junglewise.ai/threats/cve-2026-101001-a-vulnerability-was-identified-in-netcore-nbr200v2-1-3-241127)
- [Netcore NBR200V2 buffer overflow in WAN VLAN configuration](https://junglewise.ai/threats/cve-2026-94100-a-weakness-has-been-identified-in-netcore-nbr200v2-1-3-241127)
- [Netcore NBR200V2 command injection in restore.cgi](https://junglewise.ai/threats/cve-2026-94099-a-security-flaw-has-been-discovered-in-netcore-nbr200v2-1-3)
- [Netcore NBR200V2 command injection in firmware upgrade endpoint](https://junglewise.ai/threats/cve-2026-94098-a-vulnerability-was-identified-in-netcore-nbr200v2-1-3-241127)