What’s Vulnerable › Vulnerabilities

CVE-2023-43766

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-09-22 · updated 2026-06-17
• Weakness: CWE-269

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.

Affected products

• F-Secure All F-Secure Endpoint Protection products on Windows and Mac F-Secure Linux Security (32-bit) F-Secure Linux Se: 1.0.35-1
• F-Secure Client Security: 15.00
• F-Secure and WithSecure All F-Secure and WithSecure Endpoint Protection Products for Windows: from 17.0
• F-Secure Email And Server Security: 15.00
• F-Secure Linux Protection: 12.0
• F-Secure Linux Security 64: 12.0
• F-Secure Server Security: 15.00

References

• https://www.withsecure.com/en/support/security-advisories
• https://www.withsecure.com/en/support/security-advisories/cve-2023-nnn4
• https://www.withsecure.com/en/support/security-advisories
• https://www.withsecure.com/en/support/security-advisories/cve-2023-nnn4

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