What’s Vulnerable › Vulnerabilities

CVE-2020-17391

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-08-25 · updated 2026-06-17
• Weakness: CWE-749

Description

This vulnerability allows local attackers to disclose information on affected installations of Parallels Desktop 15.1.3-47255. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handler for HOST_IOCTL_INIT_HYPERVISOR in the prl_hypervisor kext. The issue results from the exposure of dangerous method or function to the unprivileged user. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the kernel. Was ZDI-CAN-10518.

Affected products

• Parallels Desktop: before 16.0.0 — fixed in 16.0.0

How to fix

Upgrade to a fixed version: Parallels Desktop 16.0.0. Check the vendor advisory for mitigations.

References

• https://kb.parallels.com/en/125013
• https://www.zerodayinitiative.com/advisories/ZDI-20-1009/
• https://kb.parallels.com/en/125013
• https://www.zerodayinitiative.com/advisories/ZDI-20-1009/

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