# CVE-2026-80237: Thinking Software Technology EFence arbitrary file upload

Source: https://junglewise.ai/threats/cve-2026-80237-thinking-software-technology-efence-arbitrary-file-upload  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-26. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-80237 · Severity: high · CVSS 8.8 · Published 2026-08-26

EFence is a web-based security application developed by Thinking Software Technology. An authenticated attacker can upload and execute malicious web shell files on the server, enabling arbitrary code execution. This allows an attacker with valid credentials to completely compromise the server and potentially access sensitive data or disrupt operations.

Technologies: [Thinking Software Technology EFence](https://junglewise.ai/threats/technologies/efence). Vendors: [Thinking Software Technology](https://junglewise.ai/threats/vendors/thinking-software-technology).

## Quick answers

**Is CVE-2026-80237 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-80237 being exploited in the wild.

**How severe is CVE-2026-80237?** High severity, with a CVSS score of 8.8, published 26 August 2026.

**Which products and versions are affected?** Thinking Software Technology EFence 1.2.66 DB Ver:56 and earlier.

**Is there a fix for CVE-2026-80237?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-80237 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-80237?** Check whether you run Thinking Software Technology EFence at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

CVE-2026-80237 is an arbitrary file upload vulnerability in EFence affecting versions 1.2.66 DB Ver:56 and earlier. The vulnerability allows authenticated remote attackers to upload and execute web shell backdoors on the server without restriction, leading to remote code execution. The attack requires valid user authentication (PR:L in CVSS vector) but no user interaction. The vulnerability can be exploited over the network to gain full control of the affected server. A patch is available in version 1.2.67 DB Ver:57 and later.

## Affected products

- Thinking Software Technology EFence 1.2.66 DB Ver:56 and earlier

## Timeline

- 2026-08-26: disclosed: Published by TWCERT/CC

## References

- [https://www.twcert.org.tw/en/cp-139-11137-c6e5f-2.html](https://www.twcert.org.tw/en/cp-139-11137-c6e5f-2.html)
- [https://www.twcert.org.tw/tw/cp-132-11133-e0167-1.html](https://www.twcert.org.tw/tw/cp-132-11133-e0167-1.html)

## Related threats

- [Thinking Software Technology EFence SQL injection](https://junglewise.ai/threats/cve-2026-89180-thinking-software-technology-efence-sql-injection)
- [Thinking Software Technology EFence SQL injection](https://junglewise.ai/threats/cve-2026-80236-thinking-software-technology-efence-sql-injection)
- [Thinking Software Technology EFence arbitrary file upload](https://junglewise.ai/threats/cve-2026-80235-thinking-software-technology-efence-arbitrary-file-upload)