Auth bypass in Totolink A8000r
CVE-2026-5676
A vulnerability was identified in Totolink A8000R 5.9c.681_B20180413. This issue affects the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument langType leads to missing authentication. The attack c…
Vulnerability class: Broken Authentication
EPSS: 0.001 (32.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Totolink A8000r — versions 5.9c.681_B20180413
Weakness classification (CWE)
References
- VDB-355503 | Totolink A8000R cstecgi.cgi setLanguageCfg missing authentication (technical-description, vdb-entry)
- VDB-355503 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #792433 | Totolink A8000R V5.9c.681_B20180413 Improper Authentication (third-party-advisory)
- cna@vuldb.com (exploit)
- cna@vuldb.com (product)
Frequently asked questions
- What is CVE-2026-5676?
- CVE-2026-5676 is a high-severity vulnerability in Totolink A8000r, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-04-06.
- How severe is CVE-2026-5676?
- High severity. CVSS v3 base score is 7.3 out of 10.