CVE-2021-27259 json
This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.0.1-48919.
published 2021-04-14 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-14024
- cvss
- 7.8
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.0.1-48919. 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 integer overflow before allocating a buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-12021.
Exploit prediction
0.46% chance of exploitation in the next 30 days, higher than 40% 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 | 7.8 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 4.4 | AV:L/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- Parallels Desktop
Classification
- Weakness
-
- CWE-190 Integer Overflow or Wraparound
References
-
kb.parallels.com
/en/125013
release-notes, vendor-advisory
-
zerodayinitiative.com
/advisories/ZDI-21-212/
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2021-27259
- NVD CVE-2021-27259
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