CVE-2023-43766

highpriority · track · 31EPSS 0.002 · 5 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.16% (5th) EPSS

CVSS 7.8 · high

Is it mine?

11 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-21

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

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-269US

affected products (11)

Products and version ranges known to be affected.

F-Secure Internet Gatekeeperall versionscert_bundDEcpe:/a:f-secure:internet_gatekeeper:-
F-Secure Linux Securityall versionscert_bundDEcpe:/a:f-secure:linux_security:-
WithSecure Endpoint Protectionall versionscert_bundDEcpe:/a:withsecure:endpoint_protection:-
n/a n/a≤ n/aenisa_euvdEU
f-secure atlant= 1.0.35-1nvdUScpe:2.3:a:f-secure:atlant:*:*:*:*:*:*:*:*
f-secure client security= 15.00nvdUScpe:2.3:a:f-secure:client_security:*:*:*:*:*:*:*:*
f-secure elements endpoint protection≥ 17.0nvdUScpe:2.3:a:f-secure:elements_endpoint_protection:*:*:*:*:*:*:*:*
f-secure email and server security= 15.00nvdUScpe:2.3:a:f-secure:email_and_server_security:*:*:*:*:*:*:*:*
f-secure linux protection= 12.0nvdUScpe:2.3:a:f-secure:linux_protection:*:*:*:*:*:*:*:*
f-secure linux security 64= 12.0nvdUScpe:2.3:a:f-secure:linux_security_64:*:*:*:*:*:*:*:*
f-secure server security= 15.00nvdUScpe:2.3:a:f-secure:server_security:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-0606WithSecure Produkte: Mehrere SchwachstellenDeutsch2023-03-08csaf · cert_bundDE
Ein entfernter, anonymer oder lokaler Angreifer kann mehrere Schwachstellen in WithSecure Endpoint Protection, F-Secure Linux Security und F-Secure Internet Gatekeeper ausnutzen, um einen Denial of Service Angriff durchzuführen oder seine Rechte zu erweitern.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2023-09-22modified 2026-06-17

references (7)

External citations — patches, advisories, analysis.

scry

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