CVE-2026-13214Network attack vector

Reader-thread crash via unbounded GetConfiguration key copy

Published Aug 25, 2026 · Updated Aug 25, 2026

Stack buffer overflow in Zephyr RTOS 4.3.0 through 4.4.1 allows remote attackers to crash the OCPP reader thread via a crafted request. The GetConfiguration parser copies the request's JSON key with unbounded strcpy into a fixed 50-byte stack buffer. Reachability requires the OCPP library and control of the configured central system, or interception of an unencrypted WebSocket; the grounded consequence is a reader-thread crash.

CVSS severityUnavailable
Unscored
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in Zephyr RTOS 4.3.0 through 4.4.1 allows remote attackers to crash the OCPP reader thread via a crafted request. The GetConfiguration parser copies the request's JSON key with unbounded strcpy into a fixed 50-byte stack buffer. Reachability requires the OCPP library and control of the configured central system, or interception of an unencrypted WebSocket; the grounded consequence is a reader-thread crash.

The record

CVE
CVE-2026-13214
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
Zephyr Project
Product
Zephyr RTOS
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record 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=4.3.0 <4.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Zephyr Project · Zephyr RTOSversion=4.3.0 <4.4.2

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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

T1499.004Application or System Exploitation

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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