CVE-2021-30359

Name: CVE-2021-30359
Creator: NVD / NIST
Published: 2021-10-22T14:15:08.53+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 3.93%

Last modified Jun 17, 2026

CVE-2021-30359 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. The Harmony Browse and the SandBlast Agent for Browsers installers must have admin privileges to execute some steps during the installation. Because the MS Installer allows regular users to repair their installation, an attacker running an installer before 90.08.7405 can start the installation repair and place a specially crafted binary in the repair folder, which runs with the admin privileges.. EPSS estimates a 3.93% chance of exploitation in the next 30 days.

Description

The Harmony Browse and the SandBlast Agent for Browsers installers must have admin privileges to execute some steps during the installation. Because the MS Installer allows regular users to repair their installation, an attacker running an installer before 90.08.7405 can start the installation repair and place a specially crafted binary in the repair folder, which runs with the admin privileges.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

3.93%

89.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Checkpoint	Harmony Browse	< 90.08.7405
Checkpoint	Sandblast Agent For Browsers	< 90.08.7405

References

https://github.com/mandiant/Vulnerability-Disclosures/blob/master/MNDT-2021-0007/MNDT-2021-0007.mdThird Party Advisory
https://supportcontent.checkpoint.com/solutions?id=sk175968Vendor Advisory
https://github.com/mandiant/Vulnerability-Disclosures/blob/master/MNDT-2021-0007/MNDT-2021-0007.mdThird Party Advisory
https://supportcontent.checkpoint.com/solutions?id=sk175968Vendor Advisory

Timeline

Published: Oct 22, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30359?

How severe is CVE-2021-30359?

CVE-2021-30359 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 3.93% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30359?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-30359?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST