{"id":"CVE-2025-1221","aliases":["EUVD-2025-23150","GHSA-542q-g93g-wjg9"],"status":"published","title":"DoS in Zigbee device due to heavy traffic","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","severity":{"version":"4.0","score":5.9,"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00214,"percentile":0.1189,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-667"],"published":"2025-07-30T08:09:19Z","modified":"2026-10-28T02:30:58Z","products":[{"vendor":"silabs.com","product":"zigbee"}],"references":[{"url":"https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-7.4.4.0.pdf","tags":["release-notes","advisory"]},{"url":"https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-8.0.2.0.pdf","tags":["release-notes","advisory"]},{"url":"https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-8.1.0.0.pdf","tags":["release-notes","advisory"]},{"url":"https://community.silabs.com/068Vm00000Sadyn","tags":["vendor-advisory","permissions-required","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-1221","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-542q-g93g-wjg9"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/1xxx/CVE-2025-1221.json","tags":["advisory"]},{"url":"https://github.com/SiliconLabs/gecko_sdk","tags":["package"]},{"url":"https://github.com/SiliconLabs/simplicity_sdk","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-1221","title":"DoS in Zigbee device due to heavy traffic","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","status":"published","published":"2025-07-30T08:09:19.214Z","modified":"2025-07-30T13:40:39.039Z","cvss":[{"version":"4.0","score":5.9,"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","level":"medium","assessor":"cna"}],"cwes":["CWE-667"],"updated_at":"2026-11-02T14:32:49.503917Z"}],"euvd":[{"id":"EUVD-2025-23150","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","status":"published","published":"2025-07-30T08:09:19Z","modified":"2025-07-30T13:40:39Z","cvss":[{"version":"4.0","score":5.9,"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","level":"medium"}],"updated_at":"2026-11-02T20:32:02.888981Z"}],"ghsa":[{"id":"GHSA-542q-g93g-wjg9","title":"A Zigbee Radio Co-Processor (RCP), which is using SiLabs EmberZNet Zigbee stack, was unable to...","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","status":"published","published":"2025-07-30T09:31:22Z","modified":"2025-07-30T09:31:29Z","cvss":[{"version":"4.0","score":5.9,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-667"],"updated_at":"2026-11-02T15:03:08.457948Z"}],"nvd":[{"id":"CVE-2025-1221","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","status":"published","published":"2025-07-30T08:15:33.133Z","modified":"2026-06-17T08:38:37.833Z","cvss":[{"version":"4.0","score":5.9,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-667"],"updated_at":"2026-11-02T14:11:21.71471Z"}],"osv":[{"id":"CVE-2025-1221","title":"DoS in Zigbee device due to heavy traffic","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","status":"published","published":"2025-07-30T08:09:19.214Z","modified":"2026-10-28T02:30:58.256068188Z","cvss":[{"version":"4.0","score":5.9,"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","level":"medium"}],"cwes":["CWE-667"],"updated_at":"2026-11-02T15:44:46.024537Z"}]}}