What is CVE-2017-20233?

CVE-2017-20233 is a medium-severity vulnerability in Belden Hirschmann Hilcos Bat867, classified under Improper Access Control. CVSS score: 5.4/10. Published 2026-04-03.

How severe is CVE-2017-20233?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Belden Hirschmann Hilcos Bat867

CVE-2017-20233

Hirschmann HiLCOS products OpenBAT, BAT450, WLC, BAT867 contains a firewall filtering vulnerability that fails to correctly filter IPv4 multicast and broadcast traffic when management IP address filtering is disabled, allowing configured f…

EPSS: 0.000 (0.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Belden Hirschmann Hilcos Bat867 — versions 0
Belden Hirschmann Hilcos Openbat, Bat450, Wlc — versions 0

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

assets.belden.com/m/11a07596f0bf1018/original/Security-Bulletin-IPv4-Multicast-… (vendor-advisory)
www.vulncheck.com/advisories/hirschmann-hilcos-layer-2-firewall-multicast-broad… (third-party-advisory)

Frequently asked questions

What is CVE-2017-20233?: CVE-2017-20233 is a medium-severity vulnerability in Belden Hirschmann Hilcos Bat867, classified under Improper Access Control. CVSS score: 5.4/10. Published 2026-04-03.
How severe is CVE-2017-20233?: Medium severity. CVSS v3 base score is 5.4 out of 10.