How severe is CVE-2021-21537?

CVE-2021-21537 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-21537 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21537?

CVE-2021-21537 affects Dell Hybrid Client. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21537?

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

When was CVE-2021-21537 published?

CVE-2021-21537 was published on 2021-04-30 and last updated on 2026-06-17.

CVE-2021-21537

CVE-2021-21537 is a medium-severity vulnerability in Dell Hybrid Client with a CVSS 3.x base score of 6.2. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 6.2)
CVSS v2: 2.1
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Dell Hybrid Client
Published: 2021-04-30
Last modified: 2026-06-17

Description

Dell Hybrid Client versions prior to 1.5 contain an information exposure vulnerability. A local unauthenticated attacker may exploit this vulnerability in order to view and exfiltrate sensitive information on the system.

Frequently asked questions

What is CVE-2021-21537?: Dell Hybrid Client versions prior to 1.5 contain an information exposure vulnerability. A local unauthenticated attacker may exploit this vulnerability in order to view and exfiltrate sensitive information on the system.
How severe is CVE-2021-21537?: CVE-2021-21537 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-21537 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21537?: CVE-2021-21537 affects Dell Hybrid Client. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21537?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21537 published?: CVE-2021-21537 was published on 2021-04-30 and last updated on 2026-06-17.

References

https://www.dell.com/support/kbdoc/en-us/000184667/dsa-2021-071-dell-hybrid-client-security-update-for-multiple-vulnerabilities

Affected products (1)

cpe:2.3:a:dell:hybrid_client:*:*:*:*:*:*:*:*

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