Introduction
Unauthorized access to diagnostic log files can expose sensitive network and authentication data, which may let attackers map infrastructure or escalate privileges. In August 2025, Check Point disclosed a high-severity vulnerability in Harmony SASE, a widely used cloud-based secure access service edge platform. The flaw is in the troubleshooting workflow, where agents upload diagnostic logs to Check Point support.
About Harmony SASE and Check Point: Check Point is a global cybersecurity vendor that sells network, cloud, and endpoint security products. Harmony SASE is its cloud-native secure access service edge platform, which provides remote access, zero trust, and security gateway functions. Organizations worldwide use it, including enterprises in finance, healthcare, technology, and other sectors, to secure distributed workforces and cloud resources.
Technical information
CVE-2025-3831 comes from the way Harmony SASE agents collect and upload log files during troubleshooting. When a user or administrator starts a diagnostic process, the agent gathers detailed logs of system configurations, network information, authentication events, and operational metrics. It then uploads these files to Check Point's support infrastructure for analysis.
The flaw is in the access controls or credential management that protect these logs once they are uploaded, either in how they are stored or in how they are retrieved. The issue is classified under two weaknesses:
- CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (link)
- CWE-798: Use of Hard-coded Credentials (link)
Together these suggest that either weak authorization checks or static credentials let parties without proper permissions access the uploaded log files. The logs may contain sensitive information such as:
- Internal IP addresses and network topology
- Authentication and session data
- Configuration details of security controls
No public exploit code or detailed technical breakdown is available. The vendor advisory confirms the exposure but gives no code snippets or specific exploit mechanisms.
Affected systems and versions
The vendor advisory does not list exact affected versions or configurations. The vulnerability affects Harmony SASE agents that use the log upload feature for troubleshooting. Organizations that use this feature should assume they are at risk until Check Point publishes more detail.
Vendor security history
Check Point has been a cybersecurity vendor for a long time and has fixed vulnerabilities in both its on-premises and cloud products before. The company generally discloses responsibly and patches in good time. Similar issues have been reported in other cloud and SASE platforms, which is a reason to put strong access controls on support processes, including the handling of diagnostic logs.
