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CVE-2026-61876 is a stored cross-site scripting vulnerability in OpenWrt LuCI caused by improper encoding of DHCPv6 lease hostnames before they are rendered in LuCI status tables and DHCP lease views. An adjacent network attacker can supply a malicious DHCPv6 Client FQDN that is recorded in DHCPv6 lease data and later displayed by LuCI without sufficient output sanitization. Available reporting also indicates that DHCPv6 hostname data written by odhcpd can be used to inject forged or malicious lease records, which are then exposed through LuCI lease handling and rendered in administrative pages such as DHCP lease status views. When an administrator opens the affected LuCI pages, attacker-controlled HTML or JavaScript executes in the administrator's browser in the context of the LuCI application.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
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13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A stored XSS vulnerability in OpenWrt LuCI DHCPv6 lease handling caused by improper encoding of DHCPv6 hostnames, enabling LAN-adjacent attackers to inject script content that executes in an administrator's browser.
A stored cross-site scripting vulnerability in OpenWrt LuCI where DHCPv6 lease hostnames are not properly encoded before being rendered, allowing an adjacent network attacker to execute script in an administrator's browser via malicious DHCPv6 Client FQDN values.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.