CVE-2026-62948: Openwrt

Critical severity, CVSS 9.6. EPSS: 0.6% chance of exploitation in the next 30 days.

OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, odhcpd writes a DHCPv6 client FQDN option 39 hostname into /tmp/odhcpd.leases through src/statefiles.c statefiles_write_state6() and statefiles_write_state4() without escaping, allowing newline injection of forged lease lines that LuCI rpcd-mod-luci getDHCPLeases displays through htdocs/luci-static/resources/view/status/include/40_dhcp.js and htdocs/luci-static/resources/luci.js dom.append as live HTML in the Active DHCPv6 Leases admin page. This vulnerability is fixed in 25.12.5.

Affected products

• Openwrt Openwrt: before 25.12.5 (fixed in 25.12.5)

Published 2026-07-15. Last modified 2026-07-21.