Zscaler Deception empowers organizations to proactively intercept targeted attacks, including zero-day vulnerabilities like CVE-2025-53770, even before they are publicly disclosed. By deploying perimeter-facing decoys, Zscaler emulates commonly targeted applications such as VPNs, firewalls, and SharePoint. These decoys are designed to only respond when they are specifically targeted via hostnames, avoiding detection during random internet scans. This approach provides early threat signals while enabling security teams to respond swiftly and block attackers before they can infiltrate or compromise an environment.
Zscaler Deception customers benefited from early detection of CVE-2025-53770 being actively exploited, with the first signs appearing on the morning of July 17th, four days ahead of the advisory issued by CISA. Through SharePoint decoys, Zscaler Deception identified malicious activity and uncovered the following IPs attempting to exploit the vulnerability:
If you are a Zscaler customer, we strongly recommend reaching out to your account manager to deploy SharePoint decoys. These decoys provide robust early-detection capabilities while serving as valuable sources of threat intelligence, critical for investigating and triaging relevant incidents.
Zscaler’s SharePoint decoys can also be deployed within ZPA environments and server VLANs to detect and stop lateral movement. This integrated solution enables Zscaler Deception to identify attackers attempting to pivot from compromised endpoints to internal SharePoint applications. As soon as such activity is detected, ZPA takes immediate action by isolating the compromised user or malicious insider, effectively preventing access to high-value assets or crown jewel applications.
By leveraging the combined power of Zscaler Deception and ZPA, organizations can significantly harden their environments against exploitation attempts and mitigate risks associated with lateral movement.
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