What is CVE-2026-19971?

CVE-2026-19971 is a medium-severity vulnerability in Lb-Link Wr1210m, classified under Improper Authentication. CVSS score: 4.7/10. Published 2026-08-17.

How severe is CVE-2026-19971?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Auth bypass in Lb-Link Wr1210m

CVE-2026-19971

A flaw has been found in LB-Link WR1210M 1.0.3. This impacts the function main of the file /www/cgi-bin/backup.cgi of the component Backup Endpoint. This manipulation causes missing authentication. The attack is only possible within the local network. The vendor was contacted early about this disclosure but did not respond in any way.

Vulnerability class: Broken Authentication

Published 2026-08-17 · last modified 2026-08-20.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (33.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Lb-Link Wr1210m — versions 1.0.3

Weakness classification (CWE)

References

vuldb.com/vuln/391148 (technical-description, vdb-entry)
vuldb.com/vuln/391148/cti (signature, permissions-required)
vuldb.com/cve/CVE-2026-19971 (third-party-advisory)
vuldb.com/submit/873139 (third-party-advisory)

Frequently asked questions

What is CVE-2026-19971?: CVE-2026-19971 is a medium-severity vulnerability in Lb-Link Wr1210m, classified under Improper Authentication. CVSS score: 4.7/10. Published 2026-08-17.
How severe is CVE-2026-19971?: Medium severity. CVSS v3 base score is 4.7 out of 10.