CVE-2026-59783Hinoki check available

Monitoring interruption via NUL-byte binary item processing

Published Oct 5, 2026 · Updated Oct 5, 2026

Denial of service in Zabbix Server and Proxy 7.0.0 through 7.0.28 and 7.4.0 through 7.4.12 allows attackers to crash monitoring processes. The disclosed behavior identifies binary item processing as the locus, but does not identify the operation that mishandles certain NUL-byte values. Exposure requires a MySQL or MariaDB Zabbix database and a way to supply a binary item value; the required privileges are not established.

CVSS severityUnavailable
Unscored
EPSS probability0.23%
Next 30 days · Oct 18, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in Zabbix Server and Proxy 7.0.0 through 7.0.28 and 7.4.0 through 7.4.12 allows attackers to crash monitoring processes. The disclosed behavior identifies binary item processing as the locus, but does not identify the operation that mishandles certain NUL-byte values. Exposure requires a MySQL or MariaDB Zabbix database and a way to supply a binary item value; the required privileges are not established.

The record

CVE
CVE-2026-59783
Published
Oct 5, 2026
Updated
Oct 5, 2026
Vendor
Zabbix
Product
Zabbix
Classifications
T1499.004
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 5, 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=7.0.0 <=7.0.28 changes=[{"at":"7.0.29","status":"unaffected"}]
  2. Affected versionversion=7.4.0 <=7.4.12 changes=[{"at":"7.4.13","status":"unaffected"}]

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Zabbix · Zabbixversion=7.0.0 <=7.0.28 changes=[{"at":"7.0.29","status":"unaffected"}]; version=7.4.0 <=7.4.12 changes=[{"at":"7.4.13","status":"unaffected"}]

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

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

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
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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