CVE-2026-127273: medium-severity vulnerability in Linksys EA8100
Linksys EA8100 JNAP API IsAdminPasswordDefault missing authentication
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
10Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3
A vulnerability has been found in Linksys EA8100 1.0.3.216940. This affects the function GetWANStatus/GetWANStatus3/IsAdminPasswordDefault of the component JNAP API. The manipulation leads to missing authentication. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
Affected products
Linksys · EA8100Related CVEs — Linksys EA8100
In the same product, most dangerous first.
CVE-2026-127277CRITICALLinksys EA8100 SMB Service service_smbd.sh initializationEPSS —CVE-2026-127276MEDIUMLinksys EA8100 Web UI cookie httponly flagEPSS —CVE-2026-127275CRITICALLinksys EA8100 JNAP API ui_server.lua SetUnsecuredWiFiWarning missing authenticationEPSS —CVE-2026-127274MEDIUMLinksys EA8100 CheckAdminPassword excessive authenticationEPSS —
References
https://github.com/geo-chen/oss/blob/main/Linksys.md#finding-1-unauthenticated-network-reconnaissance-via-getwanstatusgetwanstatus3isadminpassworddefault-exploitable-cross-origin-via-dns-rebindinghttps://vuldb.com/cve/CVE-2026-127273https://vuldb.com/submit/1040994https://vuldb.com/vuln/436428https://vuldb.com/vuln/436428/ctihttps://www.linksys.com/