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.

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

EPSS: 0.007 (49.6th percentile) — read the EPSS interpretation.

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.

Affected products

Thinking Software Technology Efence

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

twcert@cert.org.tw (third-party-advisory)
twcert@cert.org.tw (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.