CVE-2026-80237
Deferred Deferred - Pending Action

Arbitrary File Upload in EFence by Thinking Software Technology

Publication date: 2026-08-26

Last updated on: 2026-08-26

Assigner: TWCERT/CC

Description
EFence developed by Thinking Software Technology has an Arbitrary File Upload vulnerability. Authenticated remote attackers can upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.

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Meta Information

Published
2026-08-26
Last Modified
2026-08-26
Generated
2026-09-16
AI Q&A
2026-08-26
EPSS Evaluated
2026-09-14
NVD
CVE-2026-80237
EUVD
EUVD-2026-66346

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
thinking_software_technology efence *
thinking_software_technology efence to 1.2.67 (exc)
thinking_software_technology efence From 1.2.67 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-434 The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

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Executive Summary

EFence by Thinking Software Technology has an arbitrary file upload vulnerability. Authenticated remote attackers can upload and execute web shell backdoors, leading to arbitrary code execution on the server.

Detection Guidance

Detecting this vulnerability requires checking for unauthorized file uploads or web shell activity on your EFence server. Inspect server logs for unusual file uploads, particularly in web-accessible directories. Look for files with extensions like .php, .jsp, or .aspx that were uploaded by authenticated users. Monitor for unexpected network connections from the server to external IPs.

Impact Analysis

Attackers could gain control of the server by uploading malicious files, potentially stealing data, installing malware, or disrupting services. Requires authenticated access but allows full server compromise.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR (data protection) and HIPAA (health data privacy). Organizations may face fines, legal action, and reputational damage due to unauthorized access.

Mitigation Strategies

Immediately update EFence to version 1.2.67 (DB Ver:57) or later to patch the arbitrary file upload vulnerability. Ensure all user accounts with access to EFence are reviewed and follow the principle of least privilege. Implement strict file upload validation to block executable scripts and restrict upload directories.

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