Description
A vulnerability was identified in Linksys EA8100 1.0.3.216940. Impacted is an unknown function of the component Web UI. Such manipulation leads to cookie without 'httponly' flag. It is possible to launch the attack remotely. This attack is characterized by high complexity. The exploitability is considered difficult. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linksys | EA8100 | 1.0.3.216940 | — |
Advisories 1
- WID-SEC-2026-4555 Linksys Router: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
References
- VDB-436431 | Linksys EA8100 Web UI cookie httponly flag vdb-entry
- VDB-436431 | CTI Indicators (IOB, IOC) signature permissions-required
- CVE-2026-127276 | CVE Analysis and Report third-party-advisory
- Submit #1040998 | Linksys EA8100 Router firmware 1.0.3.216940 Insufficiently Protected Credentials third-party-advisory
- https://github.com/geo-chen/oss/blob/main/Linksys.md#finding-4-admin-credential-stored-in-a-non-httponly-cookie-admin-auth exploit
- https://www.linksys.com/ product