CVE-2026-61876
Stored XSS in LuCI DHCPv6 lease display allows script execution in admin browsers.
Is CVE-2026-61876 being exploited?
Not confirmed. CVE-2026-61876 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 1.3% probability of exploitation in the next 30 days.
How severe is CVE-2026-61876?
CVE-2026-61876 is rated Critical with a CVSS score of 9.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-61876?
Yes. A fix has been recorded for CVE-2026-61876. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-61876 affect?
CVE-2026-61876 affects LuCI (OpenWrt web interface), OpenWrt-based routers, Embedded devices running vulnerable LuCI versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-61876?
Apply vendor patch when available; restrict/disable LuCI admin access; block DHCPv6 from untrusted networks.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Adjacent attacker sends malicious DHCPv6 Client FQDN causing stored XSS in LuCI admin UI, enabling session theft, CSRF, or admin config manipulation.
Immediate action required