CVE-2021-34855

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.

• CWE-908

• https://kb.parallels.com/125013Patch, Vendor Advisory
• https://www.zerodayinitiative.com/advisories/ZDI-21-939/Third Party Advisory, VDB Entry
• https://kb.parallels.com/125013Patch, Vendor Advisory
• https://www.zerodayinitiative.com/advisories/ZDI-21-939/Third Party Advisory, VDB Entry

Published

Oct 25, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-3485An Improper Input Validation vulnerability in the Product Up…6.6
• CVE-2021-34850This vulnerability allows remote attackers to execute arbitr…7.8
• CVE-2021-34851This vulnerability allows remote attackers to execute arbitr…7.8
• CVE-2021-34852This vulnerability allows remote attackers to execute arbitr…7.8
• CVE-2021-34853This vulnerability allows remote attackers to execute arbitr…7.8
• CVE-2021-34854This vulnerability allows local attackers to escalate privil…7.8
• CVE-2021-34856This vulnerability allows local attackers to escalate privil…8.8
• CVE-2021-34857This vulnerability allows local attackers to escalate privil…8.8
• CVE-2021-34858This vulnerability allows remote attackers to execute arbitr…7.8
• CVE-2021-34859This vulnerability allows remote attackers to execute arbitr…8.8
• CVE-2021-3486GLPi 9.5.4 does not sanitize the metadata. This way its poss…6.1
• CVE-2021-34860This vulnerability allows network-adjacent attackers to disc…6.5