---
title: "CVE-2026-81455: Dell ThinOS - Authentication Bypass"
description: "Dell ThinOS 10 < SecurityAddon_2605.10.2766_T10 contains a missing authentication for critical function vulnerability, letting unauthenticated remote attackers gain unauthorized access, exploit requires remote access."
url: https://panop.io/threat-heartbeat/CVE-2026-81455/
---

# CVE-2026-81455 Dell ThinOS - Authentication Bypass

Dell ThinOS 10 < SecurityAddon\_2605.10.2766\_T10 contains a missing authentication for critical function vulnerability, letting unauthenticated remote attackers gain unauthorized access, exploit requires remote access.

CVSS base score 8.6 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.26% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-81455)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

Published

24 September 2026

Updated

15 October 2026

Weakness

[CWE-306](https://cwe.mitre.org/data/definitions/306.html)

## Vendor fix

Update to SecurityAddon\_2605.10.2766\_T10 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-81455](https://nvd.nist.gov/vuln/detail/CVE-2026-81455)
- [https://www.dell.com/support/kbdoc/en-us/000506503/dsa-2026-404-security-update-for-dell-thinos-10-for-multiple-vulnerabilities](https://www.dell.com/support/kbdoc/en-us/000506503/dsa-2026-404-security-update-for-dell-thinos-10-for-multiple-vulnerabilities)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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