What is CVE-2021-21532?

CVE-2021-21532 is a medium-severity vulnerability in Dell Wyse Proprietary OS (Thinos), classified under CWE-16. CVSS score: 5.0/10. Published 2021-04-02.

How severe is CVE-2021-21532?

Medium severity. CVSS v3 base score is 5.0 out of 10.

Improper input validation in Dell Wyse Proprietary OS (Thinos)

CVE-2021-21532

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.

Published 2021-04-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.002 (10.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 10.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Dell Wyse Proprietary OS (Thinos) — versions unspecified
Dell Wyse Thinos — versions 8.6

Weakness classification (CWE)

References

www.dell.com/support/kbdoc/en-us/000184665/dsa-2021-069-dell-wyse-thinos-8-6-se… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-21532?: CVE-2021-21532 is a medium-severity vulnerability in Dell Wyse Proprietary OS (Thinos), classified under CWE-16. CVSS score: 5.0/10. Published 2021-04-02.
How severe is CVE-2021-21532?: Medium severity. CVSS v3 base score is 5.0 out of 10.