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

Quick assessment

Affected
Netcore NBR200V2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Netcore NBR200V2 1.3.241127.071246 中已发现一个安全弱点。受影响的是 WAN VLAN 重新配置组件中 文件里的 函数。通过操纵 参数，可能引发缓冲区溢出漏洞。该攻击可远程发起。利用代码已公开，可能被用于发动攻击。漏洞披露方曾提前联系供应商，但对方未作任何回应。

CVSS 9.9 · Critical

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-94100

Vulnerability Information
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Vulnerability Title
Netcore NBR200V2 WAN VLAN Reconfiguration routerd wan_config_set_vlan buffer overflow
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Netcore NBR200V2 1.3.241127.071246 cpe:2.3:a:netcore:nbr200v2:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-94100

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III. Intelligence Information for CVE-2026-94100

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Other References for CVE-2026-94100 (1)

Same Patch Batch · Netcore · 2026-09-21 · 4 CVEs total

CVE-2026-94101 9.9 CRITICAL Netcore NBR200V2 routerd vlan_load_form_uci buffer overflow
CVE-2026-94099 9.9 CRITICAL Netcore NBR200V2 Backup Restore restore.cgi command injection
CVE-2026-94098 9.1 CRITICAL Netcore NBR200V2 Firmware Upgrade CGI Endpoint upgrade command injection

IV. Related Vulnerabilities

Same product: NBR200V2
Same vendor: Netcore
Same weakness: CWE-120

V. Comments for CVE-2026-94100

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