CVE-2021-34868 json
This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.1.3-49160.
published 2022-01-25 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21515
- cvss
- 7.8
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 36%
- public exploits
- 0
- none known
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.
Exploit prediction
0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 7.8 | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C |
Affected products
- Parallels Desktop
Classification
- Weakness
-
- CWE-789 Memory Allocation with Excessive Size Value
References
-
kb.parallels.com
/125013
vendor-advisory
-
zerodayinitiative.com
/advisories/ZDI-21-1056/
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2021-34868
- NVD CVE-2021-34868
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