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Netcore NBR100V2 CVE-2026-101000

| EUVDEUVD-2026-88082 CRITICAL
Missing Authorization (CWE-862)
2026-09-28 VulDB GHSA-cxfg-m6vc-37mp
9.3
CVSS 4.0 · Vendor: VulDB
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Vendor (VulDB) PRIMARY
9.3 CRITICAL
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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
vuln.today AI
10.0 CRITICAL

Unauthenticated ACL grants full config tampering (PR:N/AC:L), C/I/A:H; S:C because a compromised router impacts connected client systems; AV:N per vector though reach is often LAN-bound in practice.

3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

6
POC Analysis Generated
Sep 28, 2026 - 11:22 vuln.today
Metadata Corrected
Sep 28, 2026 - 05:40 vuln.today
tag: Router added
Re-analysis Queued
Sep 28, 2026 - 05:22 vuln.today
cvss_changed
CVSS changed
Sep 28, 2026 - 05:22 NVD
10.0 (CRITICAL) 9.3 (CRITICAL)
Analysis Generated
Sep 28, 2026 - 05:15 vuln.today
CVE Published
Sep 28, 2026 - 04:45 cve.org
CRITICAL 10.0

DescriptionCVE.org

A vulnerability was determined in Netcore NBR100V2 1.3.240614.030928. This affects the function uci.apply of the file /usr/share/rpcd/acl.d/unauthenticated.json of the component ACL Handler. This manipulation of the argument section causes missing authorization. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

Missing authorization in Netcore NBR100V2 firmware 1.3.240614.030928 allows remote unauthenticated attackers to modify device configuration via the uci.apply function, as the /usr/share/rpcd/acl.d/unauthenticated.json ACL incorrectly grants this function to unauthenticated callers. Publicly available exploit code exists, and the vendor has not responded to disclosure attempts, so no vendor-released patch is identified at time of analysis. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires network reachability to the router's rpcd/ubus management interface (the OpenWrt-style RPC daemon); no credentials or user interaction are needed because the /usr/share/rpcd/acl.d/unauthenticated.json ACL grants the uci.apply function to unauthenticated callers. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a maximum-severity signal set on paper: the input CVSS 4.0 vector is 10.0 (AV:N/AC:L/AT:N/PR:N/UI:N with full VC/VI/VA:H and subsequent-system SC/SI/SA:H) and public exploit code exists (SSVC exploitation status Proof-of-Concept, E:P). … 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; the vendor did not respond to disclosure. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory every Netcore NBR100V2 in the estate and confirm which units are running firmware 1.3.240614.030928; immediately eliminate WAN exposure of the rpcd/ubus management interface by removing any port-forwarding, DMZ, UPnP, or cloud/remote-management rules that publish it to the internet, and confirm management access is limited to trusted administrative hosts or a dedicated management VLAN. …

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CVE-2026-101000 vulnerability details – vuln.today

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