Is CVE-2023-42526 actively exploited?

No active exploitation of CVE-2023-42526 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-42526 be exploited remotely?

Yes. CVE-2023-42526 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-42526?

CVE-2023-42526 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2023-42526

HIGH

CVE-2023-42526

CWE-400Published: September 18, 2023· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

Certain WithSecure products allow a remote crash of a scanning engine via decompression of crafted data files. 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.

NVD Source

Technical Analysis

CVE-2023-42526 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.