CVE-2010-2363: Iij seil/b1 Firmware

Medium severity, CVSS 5.8. EPSS: 1.9% chance of exploitation in the next 30 days.

The IPv6 Unicast Reverse Path Forwarding (RPF) implementation on the SEIL/X1, SEIL/X2, and SEIL/B1 routers with firmware 1.00 through 2.73, when strict mode is used, does not properly drop packets, which might allow remote attackers to bypass intended access restrictions via a spoofed IP address.

Affected products

• Iij seil/b1 Firmware: version 1.00 only; version 2.01 only; version 2.10 only; version 2.20 only; version 2.30 only; version 2.40 only; …
• Iij seil/x1 Firmware: version 1.10 only; version 1.11 only; version 1.20 only; version 1.21 only; version 1.22 only; version 1.30 only; …
• Iij seil/x2 Firmware: version 1.00 only; version 1.10 only; version 1.11 only; version 1.20 only; version 1.21 only; version 1.22 only; …

Published 2010-08-30. Last modified 2026-06-16.