CVE-2011-4500

CVE-2011-4500 is a none vulnerability published on November 22, 2011. The UPnP IGD implementation on the Cisco Linksys WRT54GX with firmware 2.00.05, when UPnP is enabled, configures the SOAP server to listen on the WAN port, which allows remote attackers to administer the firewall via SOAP requests.

CVE-2011-4500 was first published in the National Vulnerability Database on November 22, 2011, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

CVE-2011-4500 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 65.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-4500, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.