CVE-2026-80235
Received Received - Intake

Arbitrary File Upload in EFence

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. Unauthenticated 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
2026-08-26
AI Q&A
2026-08-26
EPSS Evaluated
N/A
NVD
CVE-2026-80235
EUVD
EUVD-2026-66344

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
thinking_software_technology efence *

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. Unauthenticated remote attackers can upload and execute web shell backdoors, allowing arbitrary code execution on the server.

Detection Guidance

Detecting this vulnerability may involve checking for unauthorized file uploads or web shell backdoors. Monitor server logs for unusual POST requests to upload endpoints. Inspect directories like /tmp, /var/www, or web root for unexpected files. Use tools like netstat or ss to check for suspicious network connections.

Impact Analysis

Attackers could gain full control over the affected server, steal sensitive data, install malware, or disrupt services. This could lead to data breaches, system compromise, or unauthorized access to critical resources.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations may face legal penalties, fines, and reputational damage due to non-compliance.

Mitigation Strategies

Immediately restrict file uploads to trusted sources only. Disable unauthenticated access to upload endpoints. Update EFence to the latest patched version if available. Implement strict input validation for file uploads and monitor for suspicious activity.

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