What’s Vulnerable › Vulnerabilities

CVE-2023-47263

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-16 · updated 2026-06-17

Description

Certain WithSecure products allow a Denial of Service (DoS) in the antivirus engine when scanning a fuzzed PE32 file. 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, WithSecure Linux Security 64 12.0, WithSecure Linux Protection 12.0, and WithSecure Atlant (formerly F-Secure Atlant) 15 and later.

Affected products

• WithSecure Atlant: from 15.0
• WithSecure Client Security: 15
• WithSecure Elements Endpoint Protection: from 17
• WithSecure Email And Server Security: 15
• WithSecure Linux Protection: 12.0
• WithSecure Linux Security 64: 12.0
• WithSecure Server Security: 15

References

• https://www.withsecure.com/en/support/security-advisories/cve-2023-47263
• https://www.withsecure.com/en/support/security-advisories/cve-2023-47263

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