CVE-2026-76863: Incorrect Authorization in Netcore NR255-V
CVE-2026-76863 is a medium severity vulnerability in Netcore NR255-V version 1.5.130703. It allows authenticated users with broad roles to access QoS read routes and obtain live network telemetry beyond their intended privilege level due to incorrect authorization in handling mod_qos_bandwidth plan.json. This results in sensitive information disclosure.
AI Analysis
Technical Summary
Netcore NR255-V version 1.5.130703 contains an incorrect authorization vulnerability in the mod_qos_bandwidth plan.json handling within filter_conns_dump_cgi.c and IGD_CgiCall.c. Authenticated users with broad roles can exploit this flaw to access QoS read routes and retrieve live network telemetry data that exceeds their authorized privileges. The vulnerability is identified as CVE-2026-76863 with a CVSS 4.0 base score of 5.3, indicating medium severity.
Potential Impact
The vulnerability allows authenticated users with broad roles to disclose sensitive live network telemetry information beyond their intended access level. This could lead to unauthorized exposure of network performance and usage data, potentially aiding further reconnaissance or exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to authenticated users with broad roles and monitor for unauthorized access to QoS read routes.
CVE-2026-76863: Incorrect Authorization in Netcore NR255-V
Description
CVE-2026-76863 is a medium severity vulnerability in Netcore NR255-V version 1.5.130703. It allows authenticated users with broad roles to access QoS read routes and obtain live network telemetry beyond their intended privilege level due to incorrect authorization in handling mod_qos_bandwidth plan.json. This results in sensitive information disclosure.
CVSS v4.0
Score 5.3medium
Affected software
Netcore
NR255-V
pkg:github/draw-ctf/netcore-router-public-refsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Netcore NR255-V version 1.5.130703 contains an incorrect authorization vulnerability in the mod_qos_bandwidth plan.json handling within filter_conns_dump_cgi.c and IGD_CgiCall.c. Authenticated users with broad roles can exploit this flaw to access QoS read routes and retrieve live network telemetry data that exceeds their authorized privileges. The vulnerability is identified as CVE-2026-76863 with a CVSS 4.0 base score of 5.3, indicating medium severity.
Potential Impact
The vulnerability allows authenticated users with broad roles to disclose sensitive live network telemetry information beyond their intended access level. This could lead to unauthorized exposure of network performance and usage data, potentially aiding further reconnaissance or exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to authenticated users with broad roles and monitor for unauthorized access to QoS read routes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-19T21:47:08.936Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa9c06e55bf5e2cf56f8244
Added to database: 09/15/2026, 22:02:22 UTC
Last enriched: 09/15/2026, 22:25:02 UTC
Last updated: 09/16/2026, 03:17:22 UTC
Views: 3
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