CVE-2026-33754Public exploit

Unauthenticated cluster-service crash via unbounded payload allocation

Published Jul 16, 2026 · Updated Jul 16, 2026

Uncontrolled resource consumption in Wazuh Manager 3.9.0 through 4.14.4 allows remote attackers to crash cluster services via a crafted header. The cluster protocol parser unpacks the attacker-controlled total field and immediately passes it to bytearray before authentication or decryption. Remote attackers able to reach the configured cluster port can repeat headers to exhaust manager memory or crash wazuh-clusterd without sending a payload.

CVSS severity6.5
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Wazuh Manager 3.9.0 through 4.14.4 allows remote attackers to crash cluster services via a crafted header. The cluster protocol parser unpacks the attacker-controlled total field and immediately passes it to bytearray before authentication or decryption. Remote attackers able to reach the configured cluster port can repeat headers to exhaust manager memory or crash wazuh-clusterd without sending a payload.

The record

CVE
CVE-2026-33754
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
Wazuh
Product
Wazuh
Classifications
CWE-400, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 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=>= 3.9.0, < 4.14.5

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Wazuh · Wazuhversion=>= 3.9.0, < 4.14.5

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:A/AC:L/PR:N/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.

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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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Endpoint Denial of Service: Application 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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