The following code is for security research and authorized testing only.
python
# PoC for CVE-2026-33550: Weak OTP Implementation Analysis
# This script calculates the entropy of a 12-digit OTP to demonstrate the vulnerability.
import math
def calculate_entropy(length, charset_size=10):
"""Calculate entropy in bits."""
return length * math.log2(charset_size)
# Vulnerable configuration
otp_length = 12
charset_size = 10 # Assuming numeric digits as per description
entropy_bits = calculate_entropy(otp_length, charset_size)
print(f"[+] CVE-2026-33550 Analysis")
print(f"[+] OTP Length: {otp_length} digits")
print(f"[+] Estimated Entropy: {entropy_bits:.2f} bits")
print(f"[!] Vulnerability: Entropy is too low (Recommended > 64 bits).")
print(f"[!] Impact: Susceptible to brute force attacks.")
# Note: To verify the "not renewing" issue, a tester would:
# 1. Enable OTP for a user and record the Secret (A).
# 2. Disable OTP.
# 3. Enable OTP again and record the Secret (B).
# 4. Compare A and B. If A == B, the vulnerability is confirmed.