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TI-2021-13858 Aliases CVE-2021-34868GHSA-xr5h-rxwf-6q73

This vulnerability allows local attackers to escalate privileges on affected…

Priority LOW 38CWE-789Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
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-789.

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 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-13712.

Why it matters now

EPSS 0.00423 36th 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:16.1.3-49160:*:*:*:*:*:*:*16.1.3-49160VulnerableParallels
  • cpe:2.3:a:parallels:parallels:16.1.3-49160:*:*:*:*:*:*:* Versions 16.1.3-49160 Vulnerable ·Parallels

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-34868
  2. 2026-10-03 Alias added: GHSA-xr5h-rxwf-6q73

References

Advisory 2

  • TI-2021-13859 This vulnerability allows local attackers to escalate privileges on affected… CVSS 3.1HIGH 8.8
  • TI-2025-00332 Link following in Parallels Desktop CVSS 3.0HIGH 7.8
  • TI-2021-13857 This vulnerability allows local attackers to escalate privileges on affected… CVSS 3.1HIGH 8.2
  • TI-2020-05824 Parallels 13 uses cleartext HTTP as part of the update process, allowing… CVSS 3.1HIGH 7.5

Sources

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