CVE-2009-4292: Iij seil/b1

High severity, CVSS 9.3. EPSS: 4.8% chance of exploitation in the next 30 days.

Buffer overflow in the URL filtering function in Internet Initiative Japan SEIL/X1, SEIL/X2, and SEIL/B1 firmware 2.40 through 2.51 allows remote attackers to execute arbitrary code via unspecified vectors.

Affected products

• Iij seil/b1
• Iij seil/b1 Firmware: version 2.40 only; version 2.41 only; version 2.42 only; version 2.50 only; version 2.51 only
• Iij seil/x1
• Iij seil/x1 Firmware: version 2.40 only; version 2.41 only; version 2.42 only; version 2.50 only; version 2.51 only
• Iij seil/x2
• Iij seil/x2 Firmware: version 2.40 only; version 2.41 only; version 2.42 only; version 2.50 only; version 2.51 only

Published 2009-12-10. Last modified 2026-06-16.