CVE-2026-111356 magicblack CVE debrief

Who should care

Defenders responsible for MacCMS installations, operators, and security teams should assess exposure and prioritize remediation. Affected product deployments should be identified, and owners assigned for follow-up. The vulnerability's critical severity and potential operational impacts necessitate prompt action. Security teams should review compensating controls for exposed systems while remediation is scheduled and verified.

Why it matters

CVE-2026-111356 is a critical vulnerability in MacCMS v10 through 2026.1000.4056 that allows unauthenticated attackers to take over member accounts via password recovery brute-force. Defenders responsible for MacCMS installations should assess exposure and prioritize remediation.

• Account takeover via password recovery brute-force
• Potential for unauthorized access to sensitive information
• Need for additional authentication and authorization measures
• Priority for updating MacCMS to a secure version

Technical summary

MacCMS v10 through 2026.1000.4056 does not limit attempts on the six-digit password recovery code, allowing unauthenticated attackers to take over member accounts. The vulnerability is critical, with a CVSS score of 9.1, and defenders should prioritize remediation. The CVE record and source item provide details on the vulnerability, including its technical framing and potential defensive impacts. Affected product context and defensive impact should be considered when assessing exposure and prioritizing remediation.

Defensive priority

High

Recommended defensive actions

• Review and update MacCMS to a version that limits password recovery attempts
• Implement additional authentication and authorization measures
• Monitor for suspicious account activity
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and source item indicate that MacCMS v10 through 2026.1000.4056 does not limit attempts on the six-digit password recovery code, allowing unauthenticated attackers to take over member accounts.

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.