Pennyw0rth NetExec up to 1.5.0 spider_plus path traversal

Summaryinfo

A vulnerability was found in Pennyw0rth NetExec up to 1.5.0. It has been declared as critical. This issue affects some unknown processing of the component spider_plus. The manipulation results in path traversal. This vulnerability is cataloged as CVE-2026-27884. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Pennyw0rth NetExec up to 1.5.0. Affected is some unknown processing of the component spider_plus. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

NetExec is a network execution tool. Prior to version 1.5.1, the module spider_plus improperly creates the output file and folder path when saving files from SMB shares. It does not take into account that it is possible for Linux SMB shares to have path traversal characters such as `../` in them. An attacker can craft a filename in an SMB share that includes these characters, which when spider_plus crawls and downloads, can write or overwrite arbitrary files. The issue is patched in v1.5.1. As a workaround, do not run spider_plus with DOWNLOAD=true against targets.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-27884 since 02/24/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 1.5.1 eliminates this vulnerability. Applying the patch 7d027f2774d0520b322d60f9c99b9ab3edb4035e is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• Pennyw0rth

Name

• NetExec

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5.0

License

• open-source

Website

• Product: https://github.com/Pennyw0rth/NetExec/

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