Listen to this Post
How the CVE Works
CVE-2025-47994 exploits a deserialization flaw in Microsoft Office when processing maliciously crafted documents. Attackers embed harmful serialized objects within Office files (e.g., .docx, .xlsx). When opened, the application deserializes this untrusted data without proper validation, executing arbitrary code with the victim’s privileges. This occurs due to insecure .NET deserialization in Office’s document-parsing logic, enabling local privilege escalation or remote code execution (RCE) if paired with social engineering.
DailyCVE Form
Platform: Microsoft Office
Version: 2019, 2021, 365
Vulnerability: Deserialization RCE
Severity: Critical
Date: 2025-07-15
Prediction: Patch by 2025-08-30
What Undercode Say
Analytics:
Get-WinEvent -LogName "Application" | Where-Object { $_.Message -like "Office.Deserialization" }
import pickle payload = b"cos\nsystem\n(S'calc.exe'\ntR." Malicious serialized object
How Exploit:
- Crafted Office doc triggers deserialization.
- Exploit chains with macros for persistence.
Protection from this CVE:
- Disable macros by default.
- Apply Microsoft’s upcoming patch.
- Use Office Protected View.
Impact:
- Local privilege escalation.
- Full system compromise.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
