Heap-based Buffer Overflow in Windows IKE Protocol

Executive Summary

CVE-2026-50696 is a heap-based buffer overflow vulnerability in the Windows Internet Key Exchange (IKE) Protocol. This flaw allows an unauthorized attacker to send specially crafted data over a network, causing a buffer overflow in the heap memory of the affected system.

A heap-based buffer overflow occurs when a program writes more data to a buffer than it can hold, corrupting or overwriting adjacent memory in the heap. In this case, the vulnerability can be exploited remotely without any user interaction or privileges, leading to a denial of service (DoS) condition.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can impact you in the following ways:

• Denial of Service (DoS): An attacker can exploit this flaw to crash or disrupt the affected system, making it unavailable for legitimate users. This could lead to downtime for critical services relying on the Windows IKE Protocol.
• Network Disruption: Since the attack can be carried out over a network, it may affect not only the targeted system but also other connected services or devices, depending on the network configuration.
• No User Interaction Required: The attack does not require any user interaction or privileges, meaning it can be executed remotely by anyone with network access to the vulnerable system.

Useful 0 Not Useful 0

Compliance Impact

The impact of this vulnerability on compliance with common standards and regulations depends on the context of the affected system:

• GDPR: If the affected system processes or stores personal data of EU citizens, a denial of service attack could lead to availability issues, potentially violating GDPR's requirements for ensuring the confidentiality, integrity, and availability of personal data (Article 32). Prolonged downtime or data unavailability may also trigger reporting obligations under GDPR if it results in a risk to individuals' rights and freedoms.
• HIPAA: For organizations handling protected health information (PHI), this vulnerability could disrupt access to critical healthcare systems, violating HIPAA's Security Rule, which mandates the protection of PHI's availability. If the DoS attack leads to unauthorized access or data breaches due to system instability, it may also result in non-compliance with HIPAA's breach notification requirements.
• Other Standards: Compliance frameworks like ISO 27001, NIST, or PCI DSS emphasize the importance of maintaining system availability and protecting against disruptions. A successful exploitation of this vulnerability could indicate a failure to implement adequate security controls, potentially leading to non-compliance with these standards.

However, the specific impact on compliance will depend on the organization's risk assessment, the criticality of the affected systems, and whether the vulnerability is mitigated in a timely manner.

Useful 0 Not Useful 0

Mitigation Strategies

Apply the security update provided by Microsoft for CVE-2026-50696. The update addresses the heap-based buffer overflow in the Windows Internet Key Exchange (IKE) Protocol.

Monitor the Microsoft Security Response Center (MSRC) for official patches or workarounds. Refer to the provided resource for the latest guidance.

Useful 0 Not Useful 0