CVE-2026-18262Hinoki check available

SYSTEM code execution via exposed dangerous function

Published Aug 20, 2026 · Updated Aug 20, 2026

Privilege escalation in Parallels Client 21.0.26296 allows local users to execute arbitrary code as SYSTEM via the RAS RDP Backend Service. The RAS RDP Backend Service exposes a dangerous privileged function to lower-privileged callers, allowing untrusted local code to invoke it directly. Exploitation requires prior low-privileged code execution on the host, limiting exposure to local compromise paths rather than remote attacks.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Privilege escalation in Parallels Client 21.0.26296 allows local users to execute arbitrary code as SYSTEM via the RAS RDP Backend Service. The RAS RDP Backend Service exposes a dangerous privileged function to lower-privileged callers, allowing untrusted local code to invoke it directly. Exploitation requires prior low-privileged code execution on the host, limiting exposure to local compromise paths rather than remote attacks.

The record

CVE
CVE-2026-18262
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
Parallels
Product
Parallels Client
Classifications
CWE-749, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 2026Record 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=21.0.26296

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Parallels · Parallels Clientversion=21.0.26296

Published CVSS scores

7.8ZDICVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-749Exposed Dangerous Method or Function
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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