Check Point Advisories

SiYuan Authentication Bypass (CVE-2026-54069)

Vulnerability
Protection

Check Point Reference:	CPAI-2026-9714
Date Published:	3 Aug 2026
Severity:	Critical
Last Updated:	Monday 03 August, 2026
Source:
Industry Reference:	CVE-2026-54069
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	SiYuan prior to 3.7.0
Vulnerability Description	An authentication bypass vulnerability in SiYuan allows remote attackers to make fully authenticated admin API calls to the SiYuan kernel at 127.0.0.1:6806, enabling data exfiltration, stored XSS injection, and configuration tampering.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the SiYuan Authentication Bypass (CVE-2026-54069) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Application Servers Protection Violation.
Attack Information: SiYuan Authentication Bypass (CVE-2026-54069)