NetExec vulnerable to arbitrary file write via path traversal in spider_plus module
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Pennyw0rth | NetExec | before 1.5.1 | 1.5.1 | Patch available | CNA |
- NetExec VendorPennyw0rth Affected before 1.5.1 Fixed in 1.5.1 Patch available CNA
Remediation
- Fix · CNA NetExec (Pennyw0rth) Fixed in 1.5.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-27884
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences