CVE-2026-80235: CWE-434 Unrestricted Upload of File with Dangerous Type in Thinking Software Technology EFence
Description
EFence, a product by Thinking Software Technology, contains an arbitrary file upload vulnerability (CWE-434) that allows unauthenticated remote attackers to upload and execute web shell backdoors. This enables arbitrary code execution on the affected server. The vulnerability has a critical CVSS score of 9.8. No affected versions or patches have been specified yet, and no known exploits are reported in the wild.
CVSS v3.1
Score 9.8critical
Affected software
Thinking Software Technology
EFence
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-80235 describes an unrestricted file upload vulnerability in EFence by Thinking Software Technology. This flaw permits unauthenticated attackers to upload files of dangerous types, such as web shells, which can then be executed on the server, leading to arbitrary code execution. The vulnerability is classified under CWE-434 and has a CVSS 3.1 base score of 9.8, indicating critical severity. There is currently no information on affected versions or available patches, and no known exploitation has been reported.
Potential Impact
Successful exploitation allows unauthenticated remote attackers to upload and execute arbitrary files, including web shell backdoors, resulting in full compromise of the affected server. This can lead to complete loss of confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict file upload functionality, implement strict validation of uploaded file types, and monitor for suspicious uploads as interim mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- twcert
- Date Reserved
- 2026-08-26T05:58:51.131Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8ea5d1acd9273b499be739
Added to database: 08/26/2026, 08:37:37 UTC
Last enriched: 09/09/2026, 19:37:36 UTC
Last updated: 10/10/2026, 18:48:23 UTC
Views: 76
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