CVE-2021-30360Public exploit

SYSTEM privilege escalation via writable repair directory

Published Jan 7, 2022 · Updated Aug 3, 2024

Privilege escalation in Check Point Endpoint Security Client for Windows before E86.20 allows local users to execute code as SYSTEM. The Windows Installer repair flow executes temporary files from a writable %TEMP% directory controlled by the user initiating repair. Any authenticated local user can trigger MSI repair and substitute a crafted executable, gaining complete control of the Windows host.

CVSS severity7.8
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Check Point Endpoint Security Client for Windows before E86.20 allows local users to execute code as SYSTEM. The Windows Installer repair flow executes temporary files from a writable %TEMP% directory controlled by the user initiating repair. Any authenticated local user can trigger MSI repair and substitute a crafted executable, gaining complete control of the Windows host.

The record

CVE
CVE-2021-30360
Published
Jan 7, 2022
Updated
Aug 3, 2024
Vendor
Check Point Software Technologies Ltd.
Product
Check Point Endpoint Security Client for Windows
Classifications
CWE-427, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 7, 2022CVE 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=before E86.20

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Check Point Software Technologies Ltd. · Check Point Endpoint Security Client for Windowsversion=before E86.20

Published CVSS scores

7.2NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
7.8NVDCVSS:3.1/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 exploitPublished

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
T1068Exploitation for Privilege Escalation

Public exploit references

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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