CVE-2026-56165

Published Jul 24, 2026

Last updated 21 days ago

Overview

Description
Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.
Source
secure@microsoft.com
NVD status
Analyzed
CNA Tags
exclusively-hosted-service
Products
account

Risk scores

CVSS 3.1

Type
Secondary
Base score
9.8
Impact score
5.9
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity
CRITICAL

Weaknesses

secure@microsoft.com
CWE-122

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.