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TI-2021-11549 Aliases CVE-2021-31420GHSA-354r-h986-7xhw

Stack-based buffer overflow in Parallels Desktop

Priority LOW 38CWE-121Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
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-121 and the CVSS impact.

Summary

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.1.0-48950. 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 the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-12220.

Why it matters now

EPSS 0.00436 38th 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
ParallelsDesktop16.1.0-48950—No fix listedCNA
  • Desktop VendorParallels Affected 16.1.0-48950 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:parallels:parallels_desktop:16.1.0-48950:*:*:*:*:*:*:*16.1.0-48950VulnerableParallels
  • cpe:2.3:a:parallels:parallels_desktop:16.1.0-48950:*:*:*:*:*:*:* Versions 16.1.0-48950 Vulnerable ·Parallels

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-31420
  2. 2026-10-03 Alias added: GHSA-354r-h986-7xhw

References

Advisory 2

  • 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