What is CVE-2026-76863?

CVE-2026-76863 is a medium-severity vulnerability in Netcore Nr255-V, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-09-15.

How severe is CVE-2026-76863?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Netcore Nr255-V

CVE-2026-76863

Netcore NR255-V version 1.5.130703 contains a sensitive information disclosure 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 access these QoS read routes to obtain live network telemetry beyond their intended privilege level.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Netcore Nr255-v — versions 1.5.130703

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

disclosure@vulncheck.com (third-party-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-76863?: CVE-2026-76863 is a medium-severity vulnerability in Netcore Nr255-V, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-09-15.
How severe is CVE-2026-76863?: Medium severity. CVSS v3 base score is 4.3 out of 10.