CVE-2021-30359

SYSTEM privilege escalation via repair-folder binary planting

Published Oct 22, 2021 · Updated Aug 3, 2024

Local privilege escalation in Check Point Harmony Browse and SandBlast Agent for Browsers before 90.08.7405 allows local users to gain SYSTEM. A user-triggered Windows Installer repair performs SYSTEM-context operations in the user's temporary directory, including execution of temporary files, so a crafted binary placed there runs as SYSTEM. Any authenticated local user can invoke repair through the Windows Installer API or msiexec, and the resulting code execution grants full host control.

CVSS severity7.8
High
EPSS probability3.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local privilege escalation in Check Point Harmony Browse and SandBlast Agent for Browsers before 90.08.7405 allows local users to gain SYSTEM. A user-triggered Windows Installer repair performs SYSTEM-context operations in the user's temporary directory, including execution of temporary files, so a crafted binary placed there runs as SYSTEM. Any authenticated local user can invoke repair through the Windows Installer API or msiexec, and the resulting code execution grants full host control.

The record

CVE
CVE-2021-30359
Published
Oct 22, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-427, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 22, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
7.8NIST NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
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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