CVE-2023-6735

Root command execution via insufficiently quoted eval

Published Jan 12, 2024 · Updated Jun 3, 2025

Local privilege escalation in Checkmk before 2.2.0p18, 2.1.0p38, and 2.0.0p39 allows local users to execute commands as root. The mk_tsm agent plug-in insufficiently quotes command-derived text before ksh eval creates environment exports from process-list data. A low-privileged user on a monitored host can place a malicious command in that data, causing the root-run plug-in to execute it.

CVSS severity8.8
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local privilege escalation in Checkmk before 2.2.0p18, 2.1.0p38, and 2.0.0p39 allows local users to execute commands as root. The mk_tsm agent plug-in insufficiently quotes command-derived text before ksh eval creates environment exports from process-list data. A low-privileged user on a monitored host can place a malicious command in that data, causing the root-run plug-in to execute it.

The record

CVE
CVE-2023-6735
Published
Jan 12, 2024
Updated
Jun 3, 2025
Vendor
Checkmk GmbH
Product
Checkmk
Classifications
CWE-95, CAPEC-233, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 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=2.0.0 <=2.0.0p39
  2. Affected versionversion=2.1.0 <2.1.0p38
  3. Affected versionversion=2.2.0 <2.2.0p18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Checkmk GmbH · Checkmkversion=2.0.0 <=2.0.0p39; version=2.1.0 <2.1.0p38; version=2.2.0 <2.2.0p18

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8Checkmk GmbHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
CAPEC-233Privilege Escalation
T1068Exploitation for Privilege Escalation

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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