CVE WatchJul 15, 2026

CVE-2026-62948

OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, odhcpd writes a DHCPv6 client FQDN option 39 hostname into

CVSS

9.6

Critical

EPSS

0.3%

p23

KEV

—

Exploit Today

0-100

Published: Jul 15, 2026 · Last modified: Jul 15, 2026 · CWE-79 · CWE-117 · CWE-150

EPSS · 30d

Not enough EPSS history yet.

Technical description

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.

Official references

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