How severe is CVE-2021-21532?

CVE-2021-21532 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2021-21532 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21532?

CVE-2021-21532 primarily affects Dell Wyse Thinos. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-21532?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-21532 published?

CVE-2021-21532 was published on 2021-04-02 and last updated on 2026-06-17.

CVE-2021-21532

CVE-2021-21532 is a medium-severity vulnerability in Dell Wyse Thinos with a CVSS 3.x base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 5.0)
CVSS v2: 5.8
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Dell Wyse Thinos
Published: 2021-04-02
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-21532?: CVE-2021-21532 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2021-21532 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21532?: CVE-2021-21532 primarily affects Dell Wyse Thinos. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-21532?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21532 published?: CVE-2021-21532 was published on 2021-04-02 and last updated on 2026-06-17.

References

https://www.dell.com/support/kbdoc/en-us/000184665/dsa-2021-069-dell-wyse-thinos-8-6-security-update-for-an-improper-management-server-validation-vulnerabilitydsa-2021-069-dell-wyse-thinos-8-6-security-update-for-an-improper-management-server-validation-

Affected products (2)

cpe:2.3:o:dell:wyse_thinos:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:wyse_thinos:8.6:-:*:*:*:*:*:*

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