What’s Vulnerable › Vulnerabilities

CVE-2023-6874: Zigbee Unauthenticated DoS via NWK Sequence number manipulation

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-02-05 · updated 2026-06-17
• Weakness: CWE-312

Description

Prior to v7.4.0, Ember ZNet is vulnerable to a denial of service attack through manipulation of the NWK sequence number

Affected products

• silabs.com Gecko Platform: before 4.4.0 — fixed in 4.4.0

How to fix

Upgrade to a fixed version: silabs.com Gecko Platform 4.4.0. Check the vendor advisory for mitigations.

References

• https://community.silabs.com/069Vm000000WXaOIAW
• https://github.com/SiliconLabs/gecko_sdk
• https://community.silabs.com/069Vm000000WXaOIAW
• https://github.com/SiliconLabs/gecko_sdk

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