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TI-2021-13854 Aliases CVE-2021-34864GHSA-84f6-qcw2-4r4x

Improper access control in Parallels Desktop

Priority LOW 38CWE-284Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.

Summary

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 WinAppHelper component. The issue results from the lack of proper access control. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13543.

Why it matters now

EPSS 0.00236 14th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ParallelsDesktop16.1.3 (49160)—No fix listedCNA
  • Desktop VendorParallels Affected 16.1.3 (49160) Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:parallels:parallels_desktop:16.1.3:*:*:*:*:macos:*:*16.1.3VulnerableParallels
  • cpe:2.3:a:parallels:parallels_desktop:16.1.3:*:*:*:*:macos:*:* Versions 16.1.3 Vulnerable ·Parallels

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-34864
  2. 2026-10-03 Alias added: GHSA-84f6-qcw2-4r4x

References

Advisory 1

  • TI-2025-22549 Path traversal in Parallels Desktop for Mac CVSS 3.1HIGH 8.8
  • TI-2024-36288 Link following in Parallels Desktop for Mac CVSS 3.1HIGH 7.8
  • TI-2024-35227 Link following in Parallels Desktop for Mac CVSS 3.1HIGH 7.8
  • TI-2024-24264 Link following in Parallels Desktop for Mac CVSS 3.1HIGH 7.8
  • TI-2024-05787 Improper privilege management in Parallels Desktop CVSS 3.1CRITICAL 10.0
  • TI-2023-12061 Path traversal in Parallels Desktop CVSS 3.0HIGH 8.2
See all 73 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences