CVE-2026-61876

LuCI DHCPv6 Lease Hostname Stored Cross-Site Scripting

LuCI versions fail to properly encode DHCPv6 lease hostnames before rendering in status tables, allowing adjacent network attackers to inject HTML markup. Attackers can send a DHCPv6 Client FQDN containing script tags that execute in the administrator's browser when viewing DHCP lease pages.

Affected

openwrt · luci

CVSS v4.0 VULNCHECK

9.4 CRITICALCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULNCHECK

8.8 HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS

1.28% chance of exploitation in the next 30 days, 70th percentile

Published

2026-07-12

Updated

2026-07-14

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/52637

References

• CVE Record
• NVD entry