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Vulnerability record · CVE-2023-43766 · published 22 September 2023

CVE-2023-43766: F-secure linux protection improper privilege management vulnerability

F Secure · Linux Protection

Certain WithSecure products allow Local privilege escalation via the lhz 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.

7.8 CVSS 3.1 High EPSS 0.16% · top 95.4% CWE-269 · Improper privilege management
7.8CVSS 3.1 base score
0.16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Certain WithSecure products allow Local privilege escalation via the lhz 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.

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

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.withsecure.com/en/support/security-advisories Vendor Advisory
https://www.withsecure.com/en/support/security-advisories/cve-2023-nnn4 Broken Link
https://www.withsecure.com/en/support/security-advisories Vendor Advisory
https://www.withsecure.com/en/support/security-advisories/cve-2023-nnn4 Broken Link

Track CVE-2023-43766 inside VULONE

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2019-11644F-secure client security uncontrolled search path element vulnerabilityIn the F-Secure installer in F-Secure SAFE for Windows before 17.6, F-Secure Internet Security before 17.6, F-Secure Anti-Virus before 17.6, F-Secure…EPSS 1.5%7.5CVE-2023-49322F-secure linux protection vulnerabilityCertain WithSecure products allow a Denial of Service because there is an unpack handler crash that can lead to a scanning engine crash. This affects…EPSS 0.70%7.5CVE-2023-43760F-secure client security vulnerabilityCertain WithSecure products allow Denial of Service via a fuzzed PE32 file. This affects WithSecure Client Security 15, WithSecure Server Security 15…EPSS 0.64%7.5CVE-2023-43761F-secure linux protection vulnerabilityCertain WithSecure products allow Denial of Service (infinite loop). This affects WithSecure Client Security 15, WithSecure Server Security 15, WithS…EPSS 0.64%7.5CVE-2023-43765F-secure linux protection vulnerabilityCertain WithSecure products allow Denial of Service in the aeelf component. This affects WithSecure Client Security 15, WithSecure Server Security 15…EPSS 0.64%7.5CVE-2023-43767F-secure linux protection uncontrolled resource consumption vulnerabilityCertain WithSecure products allow Denial of Service via the aepack archive unpack handler. This affects WithSecure Client Security 15, WithSecure Ser…EPSS 0.64%7.5CVE-2022-45871F-secure atlant improper input validation vulnerabilityA Denial-of-Service (DoS) vulnerability was discovered in the fsicapd component used in WithSecure products whereby the service may crash while parsi…EPSS 0.40%7.5CVE-2022-38166F-secure elements endpoint protection vulnerabilityIn F-Secure Endpoint Protection for Windows and macOS before channel with Capricorn database 2022-11-22_07, the aerdl.dll unpacker handler crashes. T…EPSS 0.70%

Source: NIST National Vulnerability Database (record CVE-2023-43766), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.