Search threats, CVEs… ⌘K
Back to vendor advisories
Microsoft Security Response CenterCVE-2026-56165

Microsoft Account Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.

Read the vendor bulletin Get alerts for Microsoft Account
9.8CVSS out of 10Critical severity
Scope

What the vendor says is affected

  • Microsoft Account
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

Vulnerabilities

CVEs named in this advisory

CVE-2026-56165View CVSS, KEV, EPSS, and threat context
Keep investigating
See every advisory from this vendor