Arbitrary file upload in Thinking Software Technology Efence
CVE-2026-80235
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.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (58.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.009 · change: +0.002
Affected products
Weakness classification (CWE)
References
- www.twcert.org.tw/tw/cp-132-11133-e0167-1.html (third-party-advisory)
- www.twcert.org.tw/en/cp-139-11137-c6e5f-2.html (third-party-advisory)
Frequently asked questions
- What is CVE-2026-80235?
- CVE-2026-80235 is a critical-severity vulnerability in Thinking Software Technology Efence, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2026-08-26.
- How severe is CVE-2026-80235?
- Critical severity. CVSS v3 base score is 9.8 out of 10.