Arbitrary File Upload Vulnerability in EFence by Thinking Software Technology
CVE-2026-80235

9.3CRITICAL

Key Information:

Vendor

Thinking Software Technology

Status
Efence
Vendor
CVE Published:
26 August 2026

What is CVE-2026-80235?

EFence, developed by Thinking Software Technology, is vulnerable to an arbitrary file upload flaw that allows unauthenticated remote attackers to upload malicious files. This vulnerability can lead to the execution of web shell backdoors, thereby compromising server integrity and enabling unauthorized access and control over sensitive system resources.

Affected Version(s)

EFence 0 <= 1.2.66 DB Ver:56

References

https://www.twcert.org.tw/tw/cp-132-11133-e0167-1.html
third-party-advisory
https://www.twcert.org.tw/en/cp-139-11137-c6e5f-2.html
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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