CVE-2025-1221

5.9 MEDIUM 0.2% exploit odds No fix listed Denial of service

What it is

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

At a glance

Exploitability: Can be exploited from the same network segment with a low-privilege account. High risk of service disruption.
Exploit odds: 0.2% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2025-07-30 08:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 08:38 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.2% in the next 30 days (EPSS).
Severity: 5.9 MEDIUM (CVSS).
Fix: none linked yet, which raises it.

Details

Published: 2025-07-30 08:15 UTC
Last modified: 2026-06-17 08:38 UTC
Exploit probability: 0.2% · EPSS, next 30 days
Weakness: CWE-667
Record status: Deferred

Attack profile CVSS 4.0 · 5.9

Attack vector: Adjacent network
Complexity: Low
Attack requirements: Present
Privileges needed: Low
User interaction: None
Confidentiality: None
Integrity: None
Availability: High

Raw 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

Is it in your code?

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References

NVD record · CVE.org record