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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 status tables. An attacker on an adjacent network can supply a malicious DHCPv6 Client FQDN as part of DHCPv6 lease information, resulting in attacker-controlled HTML or script content being stored and later displayed in LuCI’s DHCP lease pages. When an administrator views the affected lease information in the web interface, the injected script executes in the administrator’s browser within the LuCI application context.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.