Information Disclosure Risk in Windows DHCP Server by Microsoft
CVE-2026-62814

6.5MEDIUM

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-2026-62814?

An integer underflow vulnerability present in the Windows DHCP Server can potentially allow unauthorized attackers to exploit network gaps. By leveraging this flaw, an attacker may gain access to sensitive information from adjacent networks, which poses significant risks to organizations relying on robust network security.

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:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.