Microsoft Urges Faster Patching and Stronger Azure Identity Controls

Microsoft is urging organizations to accelerate vulnerability remediation as frontier AI models increase vulnerability discovery and speed up both attackers and defenders. In its October 6 security guidance, the company reported that its September 2026 Patch Tuesday addressed close to 1,000 vulnerabilities and warned customers to expect elevated patch volumes for on-premises software. Microsoft described using AI-assisted scanning, validation, triage, and red teaming, alongside industry coordination on critical open-source fixes. It recommended increasing patching resources, considering deployment of fixes to critical systems within 24 hours, and strengthening defense-in-depth controls and monitoring.

Microsoft’s identity-hardening guidance complements those recommendations, including its announced second phase of mandatory Azure multifactor authentication starting in October 2025. Separate Microsoft Entra guidance recommends protecting MFA and self-service password reset enrollment with Conditional Access policies targeting “Register security information.” Organizations can restrict registration using trusted network locations and use Temporary Access Pass to help new users satisfy MFA requirements. Microsoft advises testing policies in report-only mode and excluding emergency access accounts and relevant nonhuman identities from user-scoped policies to avoid lockouts; those exclusions are not stated exemptions from Azure’s mandatory MFA rollout. For guest and external users, it provides a policy pattern blocking registration outside trusted locations, and recommends the “Require multifactor authentication” grant control when external authentication methods cannot support authentication strength requirements.