Null Pointer Dereference in WOSHttpStatusModule.dll

Publication date: 2026-05-27

Last updated on: 2026-05-29

Assigner: Tenable Network Security, Inc.

Description

When processing a request with a URL path starting with /status or /sysinfo, WOSHttpStatusModule.dll is to be loaded to handle such URL patterns. The WOSBin_LoadHttpModule function in the dll would be called to set up a "module" object for that module. However, WOSHttpStatusModule.dll is not present in the installation. As a result, a function pointer to WOSBin_LoadHttpModule (which would have been in the export table in WOSHttpStatusModule.dll) is set to NULL, resulting in calling a function at address 0.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-05-27

Last Modified

2026-05-29

Generated

2026-07-07

AI Q&A

2026-05-27

EPSS Evaluated

2026-07-05

NVD

CVE-2026-8359

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-476	The product dereferences a pointer that it expects to be valid but is NULL.

Attack-Flow Graph

Executive Summary

This vulnerability occurs when a request is processed with a URL path starting with /status or /sysinfo. The system attempts to load a module called WOSHttpStatusModule.dll to handle these URL patterns. However, this DLL is missing from the installation. Because of this, the function pointer to WOSBin_LoadHttpModule, which should be in the DLL's export table, is set to NULL. This leads to the system attempting to call a function at address 0, which is invalid.

Impact Analysis

The vulnerability has a CVSS v3.1 base score of 7.5 with the vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, indicating it can be exploited remotely without privileges or user interaction and results in a high impact on availability. Specifically, since the function pointer is NULL and a call is made to address 0, this can cause a denial of service by crashing the application or service handling the requests.

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