CVE-2021-33599

Name: CVE-2021-33599
Creator: NVD / NIST
Published: 2021-09-07T13:15:07.403+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2021-33599 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A vulnerability affecting F-Secure Antivirus engine was discovered whereby scanning WIM archive file can lead to denial-of-service (infinite loop and freezes AV engine scanner). The vulnerability can be exploit remotely by an attacker. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

Description

A vulnerability affecting F-Secure Antivirus engine was discovered whereby scanning WIM archive file can lead to denial-of-service (infinite loop and freezes AV engine scanner). The vulnerability can be exploit remotely by an attacker. A successful attack will result in Denial-of-Service of the Anti-Virus engine.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.40%

31.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-835

Affected Software

Vendor	Product	Versions
F-Secure	Atlant	All versions
F-Secure	Cloud Protection For Salesforce	All versions
F-Secure	Linux Security	All versions
F-Secure	Elements Endpoint Protection	All versions

References

Timeline

Published: Sep 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-33599?

How severe is CVE-2021-33599?

CVE-2021-33599 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2021-33599?

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-2021-33599?

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

Scan your code now

Source: NVD / NIST