{"cve":"CVE-2025-1221","nvd":{"published":"2025-07-30T08:15:33.133","modified":"2026-06-17T08:38:37.833","status":"Deferred","description":"A Zigbee Radio Co-Processor (RCP), which is using SiLabs EmberZNet Zigbee stack, was unable to send messages to the host system (CPCd) due to heavy Zigbee traffic, resulting in a Denial of Service (DoS) attack, Only hard reset will bring the device to normal operation","cvss_v4":{"vector":"CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":5.9},"cvss_v3":null,"cwes":["CWE-667"],"references":["https://community.silabs.com/068Vm00000Sadyn","https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-7.4.4.0.pdf","https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-8.0.2.0.pdf","https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-8.1.0.0.pdf"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:05:46.678065081+00:00"},"epss":{"cve":"CVE-2025-1221","score":0.00214,"percentile":0.11788,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}