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CVE-2025-55241

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CVSS

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Reports

2

First seen

Oct 1, 2025

Last seen

Aug 21, 2026

Affected product

Microsoft Entra ID (Azure AD)

Associated actors

APT29 ×1 Contagious Interview ×1 Gamaredon ×1 Nimbus Manticore ×1 NoName057 ×1 Storm-1516 ×1 Turla ×1

Recent reports

Microsoft patches critical Entra ID deserialization flaw exploited in attacks

Bleeping ComputerAug 21, 2026 High

CERT-EU Cyber Brief September 2025 – Multi-Sector Threats Across Europe

CERT-EU Threat IntelOct 1, 2025

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