CVE-2021-27260

Information disclosure via Toolgate out-of-bounds read

Published Apr 14, 2021 · Updated Aug 3, 2024

Out-of-bounds read in Toolgate in Parallels Desktop 16.0.1-48919 allows local users to disclose sensitive hypervisor memory. Toolgate insufficiently validates guest-supplied data before accessing an allocated buffer, causing a read beyond its boundary. Exploitation requires high-privileged code execution in a guest; hypervisor code execution requires chaining with another flaw.

CVSS severity3.2
Low
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Toolgate in Parallels Desktop 16.0.1-48919 allows local users to disclose sensitive hypervisor memory. Toolgate insufficiently validates guest-supplied data before accessing an allocated buffer, causing a read beyond its boundary. Exploitation requires high-privileged code execution in a guest; hypervisor code execution requires chaining with another flaw.

The record

CVE
CVE-2021-27260
Published
Apr 14, 2021
Updated
Aug 3, 2024
Vendor
Parallels
Product
Parallels Desktop
Classifications
CWE-125
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=16.0.1-48919

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Parallels · Parallels Desktopversion=16.0.1-48919

Published CVSS scores

3.2Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
3.2NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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