# CVE-2026-34027: Wertheim SafeController unrestricted file upload in uploadcustomdocuments

Source: https://junglewise.ai/threats/cve-2026-34027-wertheim-safecontroller-unrestricted-file-upload-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-15. Updated: 2026-06-15  
License: CC BY 4.0 with a link back

CVE-2026-34027 · Severity: info · CVSS 5.3 · Published 2026-06-15

Wertheim SafeController, a software suite used by banks to manage safe deposit boxes and vault access, contains a security flaw in its document upload system. An authorized user, regardless of their permission level, can bypass security checks to upload any file type to the server by spoofing the file's metadata. This could allow an attacker to place malicious files on the system, potentially leading to a full server takeover when combined with other known vulnerabilities in the product.

Technologies: [Wertheim SafeController](https://junglewise.ai/threats/technologies/safecontroller). Vendors: [Wertheim](https://junglewise.ai/threats/vendors/wertheim).

## Quick answers

**Is CVE-2026-34027 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34027 being exploited in the wild.

**How severe is CVE-2026-34027?** Informational severity, with a CVSS score of 5.3, published 15 June 2026.

**Which products and versions are affected?** Wertheim SafeController AssemblyVersion 6.15.8328.28014.

**Is there a fix for CVE-2026-34027?** 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-2026-34027 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-34027?** Check whether you run Wertheim SafeController 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

The vulnerability exists in the '/safe/contract/uploadcustomdocuments' endpoint of the Wertheim SafeController Software (AssemblyVersion 6.15.8328.28014). The application performs file type validation by checking the user-controlled HTTP Content-Type header for allowed strings (e.g., pdf, jpeg, tiff, png) rather than validating the actual file content or extension. An authenticated attacker with low-level privileges can spoof this header to upload arbitrary files. When chained with other vulnerabilities identified in the same advisory (such as path traversal or unauthenticated access to web data), this can lead to Remote Code Execution (RCE) and full system compromise, especially as the service is known to run with NT AUTHORITY/SYSTEM privileges.

## Affected products

- Wertheim SafeController Software for VAULT ROOMS (Safe Service 6.0) AssemblyVersion 6.15.8328.28014

## Timeline

- 2023-04-03: other: Vulnerability discovered by SEC Consult
- 2026-06-15: disclosed: Public disclosure of CVE-2026-34027

## References

- [https://r.sec-consult.com/wertheim](https://r.sec-consult.com/wertheim)
- [https://wertheim-safes.com/safe-deposit-box-management/](https://wertheim-safes.com/safe-deposit-box-management/)

## Related threats

- [Wertheim SafeController path traversal via branch code injection](https://junglewise.ai/threats/cve-2026-34030-wertheim-safecontroller-path-traversal-via-branch-code-injection)
- [Wertheim SafeController hard-coded cryptographic key in Security DLL](https://junglewise.ai/threats/cve-2026-34029-wertheim-safecontroller-hard-coded-cryptographic-key-in-security)
- [Wertheim SafeController unauthenticated access to web data](https://junglewise.ai/threats/cve-2026-34028-wertheim-safecontroller-unauthenticated-access-to-web-data)
- [Wertheim SafeController missing authorization in web endpoints](https://junglewise.ai/threats/cve-2026-34024-wertheim-safecontroller-missing-authorization-in-web-endpoints)