Null Pointer Dereference in Microsoft Defender by Microsoft
CVE-2026-122194

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Malware Protection Engine
Vendor
CVE Published:
10 November 2026

What is CVE-2026-122194?

A null pointer dereference vulnerability in Microsoft Defender could allow unauthorized attackers to execute arbitrary code over a network. This security flaw highlights the importance of maintaining updated software to protect against potential exploitation. Users are encouraged to review available patches to mitigate the risks associated with this vulnerability.

Affected Version(s)

Microsoft Malware Protection Engine 1.1.0.0 < 1.1.26100.4

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.