Auth bypass in Linksys E5350
CVE-2026-121933
A flaw has been found in Linksys E5350 1.0.00.037. This impacts the function save_settings of the file /wizard/apply.cgi of the component Setup Wizard. Executing a manipulation of the argument wizard_router_pwd can lead to missing authentication. The attack may be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (62.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 62nd percentile — 62.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
- Linksys E5350 — versions 1.0.00.037
Weakness classification (CWE)
References
- github.com/Zimo-666/E5350-cves/tree/main/02-empty-admin-password-auth-bypass (exploit)
- vuldb.com/cve/CVE-2026-121933 (third-party-advisory)
- vuldb.com/submit/1024276 (third-party-advisory)
- vuldb.com/vuln/431045 (technical-description, vdb-entry)
- vuldb.com/vuln/431045/cti (signature, permissions-required)
- www.linksys.com/ (product)
Frequently asked questions
- What is CVE-2026-121933?
- CVE-2026-121933 is a critical-severity vulnerability in Linksys E5350, classified under Improper Authentication. CVSS score: 10.0/10. Published 2026-11-04.
- How severe is CVE-2026-121933?
- Critical severity. CVSS v3 base score is 10.0 out of 10.