Microsoft Patches Critical Security Vulnerabilities in Azure AI Face Service and Microsoft Account

Microsoft has recently addressed two critical security vulnerabilities that posed potential risks to its cloud-based services. The security flaws, identified as CVE-2025-21415 and CVE-2025-21396, affected Azure AI Face Service and Microsoft Account, respectively. These vulnerabilities could have allowed attackers to escalate privileges and gain unauthorized access, potentially leading to severe consequences for affected users and organizations.

Microsoft has confirmed that the security updates have been fully deployed, and no further action is required from customers. However, understanding the nature of these vulnerabilities and the risks they posed is essential for maintaining a secure cloud environment.

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Summary of Threats

The following table provides an overview of the two vulnerabilities:

CVE ID	Vulnerability Name	Threat Type	CVSS Score	Affected Service	Potential Damage	Discovered By
CVE-2025-21415	Azure AI Face Service Elevation of Privilege	Authentication Bypass	9.9	Azure AI Face Service	Unauthorized access, potential data compromise	Anonymous Researcher
CVE-2025-21396	Microsoft Account Elevation of Privilege	Missing Authorization Checks	7.5	Microsoft Account	Unauthorized privilege escalation, account takeover	Sugobet

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Details of the Vulnerabilities

CVE-2025-21415: Authentication Bypass in Azure AI Face Service

Severity: Critical (CVSS Score: 9.9)
Affected Service: Azure AI Face Service
Impact: Elevation of privilege, unauthorized access
Discovery: Reported by an anonymous researcher

Microsoft identified CVE-2025-21415 as an authentication bypass vulnerability affecting the Azure AI Face Service. This flaw could have enabled an attacker with specific privileges to escalate their access rights over a network, potentially gaining unauthorized control over the cloud service.

The availability of proof-of-concept (PoC) exploit code further heightened concerns regarding this security flaw. Microsoft has since patched the vulnerability, ensuring that no further exploitation can occur.

CVE-2025-21396: Missing Authorization Checks in Microsoft Account

Severity: High (CVSS Score: 7.5)
Affected Service: Microsoft Account
Impact: Elevation of privilege, unauthorized access
Discovery: Reported by security researcher Sugobet

CVE-2025-21396 stemmed from missing authorization checks within the Microsoft Account system. If left unpatched, this flaw could have allowed unauthorized attackers to escalate privileges, potentially leading to account takeovers and data breaches.

While this vulnerability is rated lower in severity than CVE-2025-21415, it still posed a serious security risk. Microsoft confirmed that all necessary patches have been applied to mitigate the threat.

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Exploit and Mitigation

Microsoft has acknowledged that proof-of-concept (PoC) exploit code exists for CVE-2025-21415, making it particularly dangerous. However, both vulnerabilities have been fully mitigated through security patches applied to affected services.

Do Users Need to Take Any Action?

No. Microsoft has confirmed that the patches were applied automatically. Users and administrators do not need to take any further action. However, staying informed about such vulnerabilities and ensuring security best practices are followed is crucial.

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How to Detect and Remove Security Threats with SpyHunter

Although Microsoft has patched these vulnerabilities, users and businesses should remain vigilant by regularly scanning their systems for potential security risks.

Step-by-Step Guide to Detecting and Removing Security Threats

Using SpyHunter, a powerful anti-malware tool, users can detect and remove potential security threats that may exploit unpatched vulnerabilities.

Step 1: Download and Install SpyHunter

1. Download the latest version of the software.
2. Run the installation file and follow the on-screen instructions.
3. Once installed, launch SpyHunter.

Step 2: Perform a Full System Scan

1. Click on the “Scan” button to start scanning your system for security threats.
2. SpyHunter will analyze your system and detect any malicious software or vulnerabilities.
3. Wait for the scan to complete and review the list of detected threats.

Step 3: Remove Detected Threats

1. Click on “Fix Threats” to remove any identified malware, vulnerabilities, or suspicious files.
2. Restart your system to apply the changes.

Step 4: Enable Real-Time Protection

1. Turn on real-time protection to prevent future security threats.
2. Keep SpyHunter updated to stay protected against emerging cybersecurity risks.

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Preventive Measures to Avoid Future Security Risks

To minimize exposure to security vulnerabilities, users should follow these best practices:

Keep Software and Cloud Services Updated

• Enable automatic updates for all Microsoft services, including Azure and Microsoft Account.
• Regularly install security patches to protect against newly discovered vulnerabilities.

Use Strong Multi-Factor Authentication (MFA)

• Implement multi-factor authentication (MFA) for all Microsoft Accounts.
• Use hardware security keys or authentication apps for extra security.

Limit User Privileges

• Follow the principle of least privilege (PoLP) to restrict user permissions.
• Regularly review access controls and remove unnecessary privileges.

Monitor Network Traffic

• Use network monitoring tools to detect unusual activity.
• Configure firewalls to block unauthorized access attempts.

Stay Informed About Cybersecurity Threats

• Subscribe to Microsoft Security Bulletins for updates on new vulnerabilities.
• Follow trusted cybersecurity blogs and threat intelligence reports.

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Conclusion

The discovery of CVE-2025-21415 and CVE-2025-21396 highlights the critical importance of cloud security in modern IT environments. While Microsoft has swiftly patched these vulnerabilities, organizations and individuals should always prioritize proactive security measures.

By using tools like SpyHunter, implementing best security practices, and staying informed, users can reduce the risk of exploitation and maintain a secure digital environment.