CVE-2023-43767

Name: CVE-2023-43767
Creator: NVD / NIST
Published: 2023-09-22T05:15:09.937+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.53%

Last modified Jun 17, 2026

CVE-2023-43767 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Certain WithSecure products allow Denial of Service via the aepack archive unpack handler. This affects WithSecure Client Security 15, WithSecure Server Security 15, WithSecure Email and Server Security 15, WithSecure Elements Endpoint Protection 17 and later, WithSecure Client Security for Mac 15, WithSecure Elements Endpoint Protection for Mac 17 and later, Linux Security 64 12.0 , Linux Protection 12.0, and WithSecure Atlant (formerly F-Secure Atlant) 1.0.35-1.. EPSS estimates a 0.53% chance of exploitation in the next 30 days.

Description

Certain WithSecure products allow Denial of Service via the aepack archive unpack handler. This affects WithSecure Client Security 15, WithSecure Server Security 15, WithSecure Email and Server Security 15, WithSecure Elements Endpoint Protection 17 and later, WithSecure Client Security for Mac 15, WithSecure Elements Endpoint Protection for Mac 17 and later, Linux Security 64 12.0 , Linux Protection 12.0, and WithSecure Atlant (formerly F-Secure Atlant) 1.0.35-1.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.53%

40.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
F-Secure	Linux Protection	12.0
F-Secure	Linux Security 64	12.0
F-Secure	Atlant	1.0.35-1
F-Secure	Client Security	15.00
F-Secure	Elements Endpoint Protection	>= 17.0
F-Secure	Email And Server Security	15.00
F-Secure	Server Security	15.00

References

https://www.withsecure.com/en/support/security-advisoriesVendor Advisory
https://www.withsecure.com/en/support/security-advisories/cve-2023-nnn3Broken Link
https://www.withsecure.com/en/support/security-advisoriesVendor Advisory
https://www.withsecure.com/en/support/security-advisories/cve-2023-nnn3Broken Link

Timeline

Published: Sep 22, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-43767?

How severe is CVE-2023-43767?

CVE-2023-43767 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.

How do I fix CVE-2023-43767?

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-2023-43767?

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

Scan your code now

Source: NVD / NIST