CVE-2021-21535
Dell Hybrid Client versions prior to 1.5 contain a missing authentication for a critical function...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2021-21535- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-306
- Updated
- 2026-11-02
EUVDEUVD-2021-8807
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.
- Record
EUVD-2021-8807- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4mmw-26jr-m4mm No score
Dell Hybrid Client versions prior to 1.5 contain a missing authentication for a critical function...
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.
- Record
GHSA-4mmw-26jr-m4mm- Weakness
- CWE-306
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2021-21535- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.2 High
AV:L/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-306
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-21535 is a high vulnerability (CVSS 7.4) in Dell Hybrid Client, published April 30, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 10th percentile. No source names a fixed version.