CVE-2021-34854 - CVE House
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Status published High CVE-2021-34854

This vulnerability allows local attackers to escalate privileges on affected...

Vulnerability Description

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.1.3 (49160). An attacker must first obtain the ability to execute low-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the Toolgate component. The issue results from the lack of proper validation of user-supplied data, which can result in an uncontrolled memory allocation. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13544.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Billy Jheng Bing-Jhong (@st424204), Calvin Fong (@__lord_idiot) & Muhammad Alifa Ramdhan (@n0psledbyte) of STAR Labs

References

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Affected Vendor

Affected Software

Desktop
Vulnerable Versions:
16.1.3 (49160)

Timeline

Official Publish: October 25th, 2021
Last Modified: August 4th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Weaknesses (CWE)

CWE-789

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.