{"id":"CVE-2025-1221","summary":"DoS in Zigbee device due to heavy traffic","details":"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","modified":"2026-07-15T01:49:03.724123464Z","published":"2025-07-30T08:09:19.214Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/1xxx/CVE-2025-1221.json","cna_assigner":"Silabs","cwe_ids":["CWE-667"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/1xxx/CVE-2025-1221.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-1221"},{"type":"ADVISORY","url":"https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-7.4.4.0.pdf"},{"type":"ADVISORY","url":"https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-8.0.2.0.pdf"},{"type":"ADVISORY","url":"https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-8.1.0.0.pdf"},{"type":"REPORT","url":"https://community.silabs.com/068Vm00000Sadyn"},{"type":"PACKAGE","url":"https://github.com/SiliconLabs/gecko_sdk"},{"type":"PACKAGE","url":"https://github.com/SiliconLabs/simplicity_sdk"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/siliconlabs/gecko_sdk","events":[{"introduced":"0"},{"last_affected":"0c27eb9faa76187e7aa6d8314f3cfc55bb2e766a"},{"introduced":"d95099f4c05b3c40cece93d8a261dd471e642086"},{"last_affected":"d95099f4c05b3c40cece93d8a261dd471e642086"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"4.3.3"},{"introduced":"4.4.3"},{"last_affected":"4.4.3"}],"source":"AFFECTED_FIELD"}}],"versions":["4.4.3","v4.4.3","v4.3.3","v4.3.2","v4.3.1","v4.2.3","v4.3.0","v4.2.2","v4.2.1","v4.2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-1221.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/siliconlabs/simplicity_sdk","events":[{"introduced":"0"},{"last_affected":"aa5ce2e835dfdce8c20fb828f27d3a261946f946"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"2024.6.1"}],"source":"AFFECTED_FIELD"}}],"versions":["v2024.6.1-0","v2024.6.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-1221.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}