What happened
Microsoft’s November security update includes a series of serious vulnerabilities, notably an actively exploited kernel privilege‑escalation zero‑day (CVE‑2025‑62215) and a “zero‑click” remote‑code‑execution bug in the GDI+ graphics component (CVE‑2025‑60724) with a CVSS score of 9.8.
Additional troubling flaws include a Kerberos delegation elevation-of-privilege bug (CVE-2025-60704) that allows attackers to impersonate high-level users and move laterally within networks.
Who is affected
Any organization running Windows systems (especially those using Active Directory, Kerberos delegation, or hosting Web services that process graphic or metafile content) is impacted. Because some of these vulnerabilities require no user interaction and exploit widely used Windows subsystems, the risk affects enterprises of all sizes.
Why CISOs should care
- These bugs enable post-exploit privilege escalation and remote code execution with minimal or no user interaction, allowing attackers to establish deep footholds rapidly.
- The exploitability is considered high, as one is already in active use, and Microsoft flags others as “more likely to be targeted.”
- A successful compromise could lead to domain admin takeover, lateral movement, and a large-scale impact on uptime, data integrity, and regulatory compliance, exactly the kind of scenario CISOs aim to avoid.
3 Practical actions
- Prioritize patching: Immediately deploy the Microsoft updates addressing CVE-2025-62215, CVE-2025-60724, CVE-2025-60704, and associated vulnerabilities. Ensure your change-management process expedites these, rather than delays them.
- Audit and restrict Kerberos delegation: Review configurations for Kerberos delegation in your Active Directory environment. Disable unused delegation, apply the principle of least privilege, and monitor for anomalous delegation usage.
Enhance detection and response for post-exploit behavior: With several bugs facilitating privilege escalation and lateral movement, ensure you have visibility into unusual account behavior, unauthorized process spawning, and workstation-to-domain controller access patterns. Implement containment scripts or isolation playbooks in case of suspected compromise.
By acting now, CISOs can close off these high-risk vectors before adversaries exploit them on a large scale.
