What’s Vulnerable › Vulnerabilities

CVE-2026-56165: Microsoft Account Remote Code Execution Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-23 · updated 2026-10-28
• Weakness: CWE-122

Description

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

Affected products

• Microsoft Account: all versions
• Microsoft Account: all versions

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56165

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