CVE-2026-115740
Received Received - Intake

Server-Side Request Forgery in DLP On-Prem Extensions

Publication date: 2026-11-05

Last updated on: 2026-11-05

Assigner: Trellix

Description
Server side request forgery vulnerability exists in the DLP on-prem extensions version 11.13.1 and earlier allows the file Prefix parameter in the OpenEventEvidenceFile.do endpoint accepts arbitrary UNC paths without validation. The server-side code attempts to open the specified file path, causing Windows to resolve the hostname and initiate SMB authentication to the attacker-controlled host.

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Meta Information

Published
2026-11-05
Last Modified
2026-11-05
Generated
2026-11-05
AI Q&A
2026-11-05
EPSS Evaluated
N/A
NVD
CVE-2026-115740
EUVD
EUVD-2026-117545

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Trellix DLP on-prem extensions 11.13.1 and earlier

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

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Executive Summary

This is a server-side request forgery (SSRF) vulnerability in Trellix DLP on-prem extensions version 11.13.1 and earlier. It occurs because the file Prefix parameter in the OpenEventEvidenceFile.do endpoint accepts arbitrary UNC paths without validation. The server attempts to open the specified file path, causing Windows to resolve the hostname and initiate SMB authentication to an attacker-controlled host.

Detection Guidance

Monitor network traffic for unusual SMB authentication attempts originating from the DLP on-prem extensions server. Check logs for connections to unexpected or external hosts via the OpenEventEvidenceFile.do endpoint.

Impact Analysis

An attacker could exploit this to force the server to connect to arbitrary SMB shares under their control. This may lead to unauthorized access to sensitive data, internal network reconnaissance, or further attacks like credential theft via NTLM hash capture.

Mitigation Strategies

Update DLP on-prem extensions to version 11.14.0 or later. Restrict network access to the OpenEventEvidenceFile.do endpoint. Implement input validation for the file Prefix parameter to block UNC paths.

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