EUVD-2026-83812
GHSA-243x-w9gp-rr5q
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Authenticated (PR:L) remote overflow in the router daemon yields full C/I/A on the device; no genuine cross-system scope change, so S:U.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
8DescriptionCVE.org
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.
AnalysisAI
Authenticated buffer overflow in the Netcore NBR200V2 router's management daemon (/usr/bin/routerd) allows a low-privilege logged-in user to corrupt memory and potentially achieve code execution or a denial of service by supplying a manipulated vlan_wanX.ports argument to the WAN VLAN reconfiguration function wan_config_set_vlan. Only firmware build 1.3.241127.071246 has been confirmed affected, and publicly available exploit code exists; there is no confirmed actively exploited (CISA KEV) status and no vendor patch, as Netcore did not respond to the disclosure. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated low-privilege session to the router (PR:L) and reaching the WAN VLAN reconfiguration functionality, then supplying a manipulated vlan_wanX.ports argument to trigger the overflow in wan_config_set_vlan. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a classic high-CVSS-but-modest-real-risk embedded-router flaw. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch identified at time of analysis: Netcore was contacted early about this disclosure but did not respond, and there is no fixed firmware version, GitHub commit, or vendor advisory to upgrade to. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Netcore NBR200V2 routers running firmware build 1.3.241127.071246 and restrict management interface access to trusted LAN segments only; within 7 days, implement network segmentation to isolate these devices and monitor for unusual vlan_wanX.ports configuration changes or routerd crashes; within 30 days, evaluate replacement or alternative firmware since no vendor patch is available, and apply compensating controls such as strong authentication and session monitoring.
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Buffer overflow in the Netcore NBR200V2 router (firmware 1.3.241127.071246) allows an authenticated, low-privileged atta
Command injection in the Netcore NBR200V2 router (firmware 1.3.241127.071246) allows an attacker holding low-privilege c
Same weakness CWE-120 – Classic Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today