CVE-2026-56401Public exploitNetwork attack vector

Authenticated manager crash via unchecked FlatBuffer field

Published Jul 8, 2026 · Updated Jul 8, 2026

Null pointer dereference in Wazuh Manager before 5.0.0-beta3 allows remote authenticated users to crash wazuh-modulesd via inventory sync. The inventorySyncFacade consumer accepts a verifier-valid DataValue without its optional id, then calls data->id()->string_view() without checking for null. An enrolled agent is required; exploitation stops manager-side inventory processing and can disrupt other modules until wazuh-modulesd restarts.

CVSS severity6.5
Medium
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Null pointer dereference in Wazuh Manager before 5.0.0-beta3 allows remote authenticated users to crash wazuh-modulesd via inventory sync. The inventorySyncFacade consumer accepts a verifier-valid DataValue without its optional id, then calls data->id()->string_view() without checking for null. An enrolled agent is required; exploitation stops manager-side inventory processing and can disrupt other modules until wazuh-modulesd restarts.

The record

CVE
CVE-2026-56401
Published
Jul 8, 2026
Updated
Jul 8, 2026
Vendor
Wazuh
Product
Wazuh
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 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=0 <5.0.0-beta3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Wazuh · Wazuhversion=0 <5.0.0-beta3

Published CVSS scores

6.5GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

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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