Heap-based Buffer Overflow in Windows DHCP Server by Microsoft
CVE-2026-62823

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows Server 2012
Windows Server 2012 (server Core Installation)
Windows Server 2012 R2
Windows Server 2012 R2 (server Core Installation)
Vendor
CVE Published:
11 August 2026

What is CVE-2026-62823?

A heap-based buffer overflow is present in the Windows DHCP Server, which may allow an unauthorized attacker to execute arbitrary code on an adjacent network. This vulnerability can lead to significant security risks, as it could be exploited to gain unauthorized access or control over affected systems. Keeping the DHCP Server updated is crucial to mitigating this risk.

Affected Version(s)

Windows Server 2012 (Server Core installation) x64-based Systems 6.2.9200.0 < 6.2.9200.26280

Windows Server 2012 R2 (Server Core installation) x64-based Systems 6.3.9600.0 < 6.3.9600.23338

Windows Server 2012 R2 x64-based Systems 6.3.9600.0 < 6.3.9600.23338

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:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.