Code injection vulnerability in ELECOM wireless LAN routers allows a network-adjacent authenticated attacker to execute arbitrary code by sending a specially crafted request. Affected products and versions are as follows: WRC-1167GHBK-S v1.03 and earlier, WRC-1167GEBK-S v1.03 and earlier, WRC-1167FEBK-S v1.04 and earlier, WRC-1167GHBK3-A v1.24 and earlier, and WRC-1167FEBK-A v1.18 and earlier.