CVE-2026-56165
CriticalCVSS 9.8Exploitation Probability (EPSS)
Elevated risk62th percentile - higher than 62% of all known CVEs
Summary
Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.
Risk Assessment
An attacker can remotely execute code on the victim's system, potentially leading to compromise of the Microsoft account and theft of personal data.
Recommendation
Apply the security update from Microsoft that fixes this vulnerability.
Other vulnerabilities in Microsoft Account
See all- CVE-2026-85329High
Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Account allows an authorized attacker to elevate privileges locally.
- CVE-2026-83847High
Heap-based buffer overflow in Microsoft Account allows an authorized attacker to elevate privileges locally.
- CVE-2026-68852Medium
A vulnerability in Microsoft Account involves the use of an uninitialized resource. An authorized attacker could exploit this to disclose information locally.
- CVE-2026-68850High
Heap-based buffer overflow in Microsoft Account allows an authorized attacker to elevate privileges locally.
Original NVD description (English source)
Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS