CVE-2026-103674 Checkmk CVE debrief

Who should care

Checkmk server administrators, security teams, and users with access to the Checkmk server should be aware of this vulnerability and take steps to mitigate it. They should verify and limit access to the process list, review and update server configurations, and consider implementing additional security measures to protect sensitive information. Additionally, they should review compensating controls for exposed systems while remediation is scheduled and

Why it matters

CVE-2026-103674 is a low-severity vulnerability in the Checkmk special agent for NetApp ONTAP, allowing local users to read NetApp login passwords from the process list. Checkmk server administrators should verify and limit access to the process list, review and update server configurations, and consider implementing additional security measures to protect sensitive information.

• Local users with access to the Checkmk server can read sensitive information (NetApp login passwords) from the process list.
• The vulnerability allows unauthorized access to sensitive information, potentially leading to further exploitation.
• Verification of Checkmk server configurations and user access controls is necessary to prevent exploitation.

Technical summary

The Checkmk special agent for NetApp ONTAP includes the login password in the command line, allowing a local user on the Checkmk server to read the password from the process list while the special agent is running. This vulnerability affects Checkmk version 2.5.0 before 2.5.0p16 and allows unauthorized access to sensitive information. The vulnerability is a result of the special agent including the login password in the command line, which can be read by a local user from the process list. Checkmk server administrators should verify and limit access to the process list, review and update server configurations, and consider implementing additional security measures to protect sensitive information.

Defensive priority

Checkmk server administrators should verify and limit access to the process list for users who should not have access to sensitive information.

Recommended defensive actions

• Verify and limit access to the process list for users who should not have access to sensitive information.
• Review and update Checkmk server configurations to prevent unauthorized access to sensitive information.
• Consider implementing additional security measures to protect sensitive information, such as encryption or secure storage.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability, with the primary source being the Checkmk security advisory. The advisory states that the special agent for NetApp ONTAP includes the login password in the command line, allowing local users to read the password from the process list. However, the advisory does not provide detailed information about the affected scope, severity, or vendor guidance. Defenders should verify the affected product deployments, review the supplied official advisory or CVE to

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.