CVE-2026-61875
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk29th percentile - higher than 29% of all known CVEs
Summary
A stored cross-site scripting (XSS) vulnerability in luci-app-upnp allows unauthenticated LAN clients to inject malicious JavaScript via UPnP IGD AddPortMapping SOAP requests. Attackers can send malicious HTML in the NewPortMappingDescription field, which is stored by miniupnpd and rendered without output encoding by luci-app-upnp, executing the payload when administrators view the UPnP or Status pages.
Risk Assessment
The risk involves potential session hijacking of the administrator, theft of credentials, or unauthorized actions in the device management interface, potentially leading to full compromise of the router or other network device.
Recommendation
Immediately update the luci-app-upnp package to a version that includes output encoding fixes for UPnP-derived data. Until the update is applied, disable the UPnP service on the device.
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Original NVD description (English source)
luci-app-upnp contains a stored cross-site scripting vulnerability that allows unauthenticated LAN clients to inject JavaScript via UPnP IGD AddPortMapping SOAP requests. Attackers can send malicious HTML in the NewPortMappingDescription field, which miniupnpd stores and luci-app-upnp renders without output encoding, executing the payload when administrators view the UPnP or Status pages.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

