Vulnerability · Published Sep 21, 2026 · Assigned by VulDB

CVE-2026-94100Netcore NBR200V2 WAN VLAN Reconfiguration routerd wan_config_set_vlan buffer overflow

Critical 9.9

In plain English

A critical-severity buffer overflow in NBR200V2 from Netcore. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).

Severity (CVSS 3.1)9.9Critical

Exploit odds (30 days)0.8%top 43.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A weakness has been identified in Netcore NBR200V2 1.3.241127.071246. Impacted is the function wan_config_set_vlan of the file /usr/bin/routerd of the component WAN VLAN Reconfiguration. Executing a manipulation of the argument vlan_wanX.ports can lead to buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products (as reported)

Vendor	Product	Versions
Netcore	NBR200V2	1.3.241127.071246

Weakness: CWE-120, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-408029 | Netcore NBR200V2 WAN VLAN Reconfiguration routerd wan_config_set_vlan buffer overflow vdb-entry, technical-description
VDB-408029 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-94100 | CVE Analysis and Report third-party-advisory
Submit #892994 | netcore NBR200V2 V1.3.241127.071246 Buffer Overflow third-party-advisory
https://app.notion.com/p/Netcore-NBR200V2-Vul-8-39f797159f158003ad3eff2fd36342b6 exploit