What is CVE-2026-76855?

CVE-2026-76855 is a medium-severity vulnerability in Netcore Nr255-V, classified under Exposure of Private Personal Information to an Unauthorized Actor. CVSS score: 6.5/10. Published 2026-09-15.

How severe is CVE-2026-76855?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Netcore Nr255-V

CVE-2026-76855

Netcore NR255-V version 1.5.130703 contains a sensitive information disclosure vulnerability in the audit endpoints handled by l7_web_auth_log_dump_cgi.c, audit_get_cgi.c, and mod_dispatch_auth/plan.json. Attackers can query these audit components to obtain other users' session and browsing history data across sessions.

Published 2026-09-15 · last modified 2026-09-16.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (33.4th percentile), scored 2026-10-31.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Netcore Nr255-V — versions 1.5.130703

Weakness classification (CWE)

CWE-359 — Exposure of Private Personal Information to an Unauthorized Actor

References

github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr2… (third-party-advisory)
www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-cross-user-session-disc… (third-party-advisory)

Frequently asked questions

What is CVE-2026-76855?: CVE-2026-76855 is a medium-severity vulnerability in Netcore Nr255-V, classified under Exposure of Private Personal Information to an Unauthorized Actor. CVSS score: 6.5/10. Published 2026-09-15.
How severe is CVE-2026-76855?: Medium severity. CVSS v3 base score is 6.5 out of 10.