Auth bypass in Wavlink Wn536ax6-A
CVE-2026-120278
A vulnerability was detected in WAVLINK WN536AX6-A V260507_2.0.0. Impacted is the function sub_416d48/sub_41a7c0 of the file /bin/ioos of the component VPN Client List Handler. Performing a manipulation of the argument opt results in missing authentication. The attack can be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure.
Vulnerability class: Broken Authentication
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Wavlink Wn536ax6-A — versions V260507_2.0.0
Weakness classification (CWE)
References
- vuldb.com/vuln/429622 (technical-description, vdb-entry)
- vuldb.com/vuln/429622/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-120278 (third-party-advisory)
- vuldb.com/submit/919506 (third-party-advisory)
- github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN536AX6-A Router/WAVLINK… (exploit)
Frequently asked questions
- What is CVE-2026-120278?
- CVE-2026-120278 is a medium-severity vulnerability in Wavlink Wn536ax6-A, classified under Improper Authentication. CVSS score: 5.3/10. Published 2026-11-02.
- How severe is CVE-2026-120278?
- Medium severity. CVSS v3 base score is 5.3 out of 10.