CVE-2021-21535

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-30 · updated 2026-06-17
Weakness: CWE-306

Description

Dell Hybrid Client versions prior to 1.5 contain a missing authentication for a critical function vulnerability. A local unauthenticated attacker may exploit this vulnerability in order to gain root level access to the system.

Affected products

Dell Hybrid Client (DHC): before 1.5 — fixed in 1.5

How to fix

Upgrade to a fixed version: Dell Hybrid Client (DHC) 1.5. Check the vendor advisory for mitigations.

References

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

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