# CVE-2026-40715: Dell ThinOS 10 privilege escalation via improper access control

Source: https://junglewise.ai/threats/cve-2026-40715-dell-thinos-10-privilege-escalation-via-improper-access-control  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-02. Updated: 2026-06-02  
License: CC BY 4.0 with a link back

CVE-2026-40715 · Severity: high · CVSS 7.8 · Published 2026-06-02

Dell ThinOS is an operating system used in thin-client devices for accessing virtual desktops and cloud applications. A security flaw in this system allows a user with low-level access to gain higher administrative privileges. This could allow an unauthorized person to take full control of the device, potentially compromising sensitive data or disrupting business operations.

Technologies: [Dell ThinOS](https://junglewise.ai/threats/technologies/thinos). Vendors: [Dell](https://junglewise.ai/threats/vendors/dell).

## Quick answers

**Is CVE-2026-40715 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-40715 being exploited in the wild.

**How severe is CVE-2026-40715?** High severity, with a CVSS score of 7.8, published 2 June 2026.

**Which products and versions are affected?** Dell ThinOS Versions prior to 2602_10.0765_T10.

**Is there a fix for CVE-2026-40715?** A patch was published on 2026-05-15: Remediated firmware versions released. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-40715 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-40715?** Check whether you run Dell ThinOS 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

Dell ThinOS 10 versions prior to 2602_10.0765 contain an improper access control vulnerability (CWE-284). The flaw exists within the proprietary code of the operating system. A local attacker with low-level privileges can exploit this weakness to escalate their permissions to a higher level, potentially gaining full administrative control. The attack requires local access but no user interaction. Dell has released remediated firmware versions (2602_10.0765_T10 or later) for affected Latitude, OptiPlex, and Wyse hardware platforms.

## Affected products

- Dell ThinOS 10 Versions prior to 2602_10.0765_T10

## Timeline

- 2026-05-15: patched: Remediated firmware versions released.
- 2026-06-02: disclosed: Initial advisory publication.

## References

- [https://www.dell.com/support/kbdoc/en-us/000463678/dsa-2026-214](https://www.dell.com/support/kbdoc/en-us/000463678/dsa-2026-214)

## Related threats

- [Dell ThinOS 10 OS command injection](https://junglewise.ai/threats/cve-2026-81468-dell-thinos-10-os-command-injection)
- [Dell ThinOS 10 OS command injection](https://junglewise.ai/threats/cve-2026-81467-dell-thinos-10-os-command-injection)
- [Dell ThinOS 10 code integrity check bypass](https://junglewise.ai/threats/cve-2026-81052-dell-thinos-10-code-integrity-check-bypass)
- [Dell ThinOS 10 security version number bypass](https://junglewise.ai/threats/cve-2026-81051-dell-thinos-10-security-version-number-bypass)
- [Dell ThinOS 10 missing integrity check in code execution](https://junglewise.ai/threats/cve-2026-81049-dell-thinos-10-missing-integrity-check-in-code-execution)