Cross-site request forgery (CSRF) vulnerability in ELECOM wireless LAN routers allows a remote unauthenticated attacker to hijack the authentication of administrators and to perform unintended operations to the affected product. Affected products and versions are as follows: WRC-1167GS2-B v1.67 and earlier, WRC-1167GS2H-B v1.67 and earlier, WRC-2533GS2-B v1.62 and earlier, WRC-2533GS2-W v1.62 and earlier, and WRC-2533GS2V-B v1.62 and earlier.