CVE-2023-51394Network attack vector

Device crash via null buffer dereference

Published Feb 23, 2024 · Updated Aug 16, 2024

NULL pointer dereference in Silicon Laboratories Zigbee EmberZNet SDK before 7.4.0 allows remote attackers to crash devices. During high Zigbee traffic, the stack dereferences a null packet-buffer value without validating it before use. Network access is sufficient and no authentication or user interaction is required; the bounded consequence is a device crash.

CVSS severity5.3
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

NULL pointer dereference in Silicon Laboratories Zigbee EmberZNet SDK before 7.4.0 allows remote attackers to crash devices. During high Zigbee traffic, the stack dereferences a null packet-buffer value without validating it before use. Network access is sufficient and no authentication or user interaction is required; the bounded consequence is a device crash.

The record

CVE
CVE-2023-51394
Published
Feb 23, 2024
Updated
Aug 16, 2024
Vendor
Silicon Laboratories
Product
Zigbee EmberZNet SDK
Classifications
CWE-476, CAPEC-595, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 23, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <7.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Silicon Laboratories · Zigbee EmberZNet SDKversion=0 <7.4.0

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.3Silicon LabsCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
CAPEC-595Connection Reset
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo