Dell Wyse ThinOS 8.6 Management Server certificate validation

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.

A vulnerability was found in Dell Wyse ThinOS 8.6. It has been classified as critical. Affected is an unknown part of the component Management Server. The manipulation with an unknown input leads to a weak authentication vulnerability. CWE is classifying the issue as CWE-295. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Dell Wyse ThinOS 8.6 MR9 contains remediation for an improper management server validation vulnerability that could be potentially exploited to redirect a client to an attacker-controlled management server, thus allowing the attacker to change the device configuration or certificate file.

The weakness was disclosed 04/04/2021 as dsa-2021-069. The advisory is shared for download at This vulnerability is traded as CVE-2021-21532 since 01/04/2021. The exploitability is told to be difficult. The attack needs to be done within the local network. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 04/10/2021). The MITRE ATT&CK project declares the attack technique as T1587.003.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.




CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.6
VulDB Temp Score: 4.6
VulDB Vector: 🔒
VulDB Reliability: 🔍



VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍


Class: Weak authentication
CWE: CWE-295
ATT&CK: T1587.003

Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒


Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍


Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒


01/04/2021 CVE assigned
04/04/2021 +89 days Advisory disclosed
04/04/2021 +0 days VulDB entry created
04/10/2021 +6 days VulDB last update



Advisory: dsa-2021-069
Status: Confirmed

CVE: CVE-2021-21532 (🔒)


Created: 04/04/2021 09:22 AM
Updated: 04/10/2021 07:16 AM
Changes: (1) source_cve_cna
Complete: 🔍


No comments yet. Please log in to comment.

Do you need the next level of professionalism?

Upgrade your account now!