Remote Code Execution Vulnerability in Windows Reliable Multicast Transport Driver
CVE-2026-69530

8.1HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1809
Windows Server 2019
Windows Server 2019 (server Core Installation)
Windows Server 2022
Vendor
CVE Published:
8 September 2026

What is CVE-2026-69530?

A vulnerability in the Windows Reliable Multicast Transport Driver (RMCAST) can be exploited by an unauthorized attacker to execute arbitrary code over a network. This type of vulnerability occurs when a program continues to use a pointer after the memory it points to has been freed, potentially leading to unauthorized actions and system compromise. It is crucial for users and administrators to apply available patches to mitigate the risk associated with this vulnerability.

Affected Version(s)

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.9245

Windows Server 2019 (Server Core installation) x64-based Systems 10.0.17763.0 < 10.0.17763.9245

Windows Server 2019 x64-based Systems 10.0.17763.0 < 10.0.17763.9245

References

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

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.