DoS in Zigbee device due to heavy traffic_CVE-2025-1221

5.9 / 10

MEDIUM

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

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

Basic Information

ID CVE-2025-1221

Source Silabs

Published Jul 30, 2025 at 08:09

Modified Jul 30, 2025 at 13:40

Affected Product

Vendor silabs.com

Product Zigbee

Affected Versions silabs.com Zigbee 0
silabs.com Zigbee 4.4.3
silabs.com Zigbee 0

CWE Classification

CWE-667

References

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    "lastseen": "",
    "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",
    "published": "2025-07-30T08:09:19.214Z",
    "modified": "2025-07-30T13:40:39.039Z",
    "type": "cve",
    "title": "DoS in Zigbee device due to heavy traffic",
    "source": "Silabs",
    "references": "https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-7.4.4.0.pdf\nhttps://www.silabs.com/documents/public/release-notes/emberznet-release-notes-8.0.2.0.pdf\nhttps://www.silabs.com/documents/public/release-notes/emberznet-release-notes-8.1.0.0.pdf\nhttps://community.silabs.com/068Vm00000Sadyn",
    "id": "CVE-2025-1221",
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    "sourceData": "silabs.com Zigbee 0\nsilabs.com Zigbee 4.4.3\nsilabs.com Zigbee 0",
    "sourceHref": "",
    "cvss": {
        "score": 5.9,
        "severity": "MEDIUM",
        "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",
        "version": "4.0"
    },
    "cvss2": [],
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        "cvssV3": {
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    "href": "",
    "category_name": "CVE",
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    "product": "Zigbee",
    "version": "0",
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