Heap-based Buffer Overflow in Windows RRAS by Microsoft
CVE-2025-49663

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows Server 2019
Windows Server 2019 (server Core Installation)
Windows Server 2022
Windows Server 2025 (server Core Installation)
Vendor
CVE Published:
8 July 2025

What is CVE-2025-49663?

The vulnerability presents a heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS), potentially allowing unauthorized attackers to execute arbitrary code across a network. This flaw could facilitate exploitation via specially crafted network requests, posing significant security risks to affected systems.

Affected Version(s)

Windows Server 2008 Service Pack 2 x64-based Systems 6.0.6003.0 < 6.0.6003.23418

Windows Server 2008 R2 Service Pack 1 (Server Core installation) x64-based Systems 6.1.7601.0 < 6.1.7601.27820

Windows Server 2008 R2 Service Pack 1 x64-based Systems 6.1.7601.0 < 6.1.7601.27820

References

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

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

.