CVE-2026-18367 Sophos CVE debrief

Who should care

Organizations using Sophos Endpoint for macOS or Sophos Home for macOS should prioritize patching to mitigate the risk of local privilege escalation attacks. IT administrators, security teams, and system operators responsible for these systems should take immediate action to assess exposure and apply necessary patches or mitigations. Vulnerability management and incident response teams should also review the vulnerability details to prepare for potential exploitation attempts and monitor system logs for suspicious activity related to this vulnerability. Additionally, asset owners and system administrators should inventory affected systems and prioritize patching based on criticality and exposure. Security teams should also review compensating controls for exposed systems while remediation is scheduled and verified, and check relevant monitoring, detection, and logs for exposed assets that need extra review. This includes reviewing system configurations, monitoring for potential exploitation attempts, and ensuring that patches are applied according to vendor guidance. The vulnerability's critical severity and potential impact on system security necessitate prompt attention from all relevant stakeholders, including those responsible for system maintenance, security, and compliance. By taking proactive measures, organizations can reduce the risk of exploitation and protect their systems from potential attacks. This requires coordination between IT, security, and management teams to ensure that all necessary steps are taken to mitigate the vulnerability effectively. The goal is to ensure that all affected systems are patched or mitigated, and that ongoing monitoring and review are in place to detect and respond to potential security incidents related to this vulnerability. This includes verifying that patches have been applied correctly, monitoring system logs for suspicious activity, and being prepared to respond quickly in the event of a security incident. By prioritizing patching and taking proactive measures, organizations can minimize the risk of exploitation and protect their systems from potential attacks. This vulnerability highlights the importance of up-to

Technical summary

CVE-2026-18367 is a critical privilege escalation vulnerability affecting Sophos Endpoint for macOS versions older than 2026.1.1 and Sophos Home for macOS versions older than 10.11.6. The vulnerability allows local users to execute arbitrary code as root. The CVSS score for this vulnerability is 9.3, indicating critical severity.

Defensive priority

Local privilege escalation vulnerability in Sophos Endpoint and Sophos Home for macOS; apply vendor patches immediately.

Recommended defensive actions

• Apply patches for Sophos Endpoint for macOS version 2026.1.1 or later and Sophos Home for macOS version 10.11.6 or later.
• Inventory affected systems and prioritize patching based on criticality and exposure.
• Monitor for potential exploitation attempts and review system logs for suspicious activity.

Evidence notes

The CVE-2026-18367 record indicates a critical privilege escalation vulnerability in Sophos Endpoint for macOS older than version 2026.1.1 and Sophos Home for macOS older than version 10.11.6. Limited information is available from the CVE and NVD entries. Defenders should verify system configurations, review logs for suspicious activity, and ensure patches are applied according to vendor guidance.

Official resources