CVE-2024-42333Network attack vector

Memory disclosure via RFC 2047 encoder over-read

Published Nov 27, 2024 · Updated Nov 3, 2025

Heap buffer over-read in Zabbix Server allows remote authenticated users to read small fragments of server memory through crafted email data. The str_base64_encode_rfc2047 function in src/libs/zbxmedia/email.c reads beyond a heap buffer while encoding a crafted non-ASCII email header. High-privilege access to a network-reachable server is required, and the reported consequence is limited to disclosure of a small amount of process memory.

CVSS severity2.7
Low
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer over-read in Zabbix Server allows remote authenticated users to read small fragments of server memory through crafted email data. The str_base64_encode_rfc2047 function in src/libs/zbxmedia/email.c reads beyond a heap buffer while encoding a crafted non-ASCII email header. High-privilege access to a network-reachable server is required, and the reported consequence is limited to disclosure of a small amount of process memory.

The record

CVE
CVE-2024-42333
Published
Nov 27, 2024
Updated
Nov 3, 2025
Vendor
Zabbix
Product
Zabbix
Classifications
CWE-126, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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=6.0.0 <=6.0.33 changes=[{"at":"6.0.34rc1","status":"unaffected"}]
  2. Affected versionversion=6.4.0 <=6.4.18 changes=[{"at":"6.4.19rc1","status":"unaffected"}]
  3. Affected versionversion=7.0.0 <=7.0.3 changes=[{"at":"7.0.4rc1","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Zabbix · Zabbixversion=6.0.0 <=6.0.33 changes=[{"at":"6.0.34rc1","status":"unaffected"}]; version=6.4.0 <=6.4.18 changes=[{"at":"6.4.19rc1","status":"unaffected"}]; version=7.0.0 <=7.0.3 changes=[{"at":"7.0.4rc1","status":"unaffected"}]

Published CVSS scores

2.7ZabbixCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-126Buffer Over-read
T1190Exploit Public-Facing Application

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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