CVE-2026-56165

Microsoft Account Remote Code Execution Vulnerability

Published Jul 23, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Microsoft account
Vendors & Products Microsoft account
Type Values Removed Values Added
Description Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.
Title Microsoft Account Remote Code Execution Vulnerability
First Time appeared Microsoft
Microsoft microsoft Account
Weaknesses CWE-122
CPEs cpe:2.3:a:microsoft:microsoft_account:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft microsoft Account
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Nov 10, 2026, 10:34 PM
Reserved
Jun 19, 2026, 1:53 PM
Status
Analyzed
Published
Jul 24, 2026, 1:17 AM
Modified
Oct 24, 2026, 1:10 PM