CVE-2023-1262Network attack vector

Network message injection via unencrypted frame acceptance

Published Mar 21, 2023 · Updated Feb 26, 2025

Missing authorization in Silicon Labs Wi-SUN Linux Border Router 1.0.0 through 1.5.2 allows remote attackers to inject network traffic. The wsbrd MAC layer accepts unencrypted data and PAN-configuration frames from a malicious Wi-SUN node instead of rejecting them before routing. Exploitation requires a node capable of reaching the Wi-SUN radio network and permits injected messages to traverse the routed network.

CVSS severity8.2
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Silicon Labs Wi-SUN Linux Border Router 1.0.0 through 1.5.2 allows remote attackers to inject network traffic. The wsbrd MAC layer accepts unencrypted data and PAN-configuration frames from a malicious Wi-SUN node instead of rejecting them before routing. Exploitation requires a node capable of reaching the Wi-SUN radio network and permits injected messages to traverse the routed network.

The record

CVE
CVE-2023-1262
Published
Mar 21, 2023
Updated
Feb 26, 2025
Vendor
Sigma Designs
Product
Wi-SUN Linux Border Router
Classifications
CWE-862
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=1.0.0 <=1.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sigma Designs · Wi-SUN Linux Border Routerversion=1.0.0 <=1.5.2

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
8.2Silicon LabsCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

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-862Missing Authorization

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

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Your stack

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