CVE-2023-47263
CVE-2023-47263 is a high-severity vulnerability in Withsecure Client Security with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- EPSS exploit prediction: 1% (49th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Withsecure Client Security
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2023-47263?
- 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.
- How severe is CVE-2023-47263?
- CVE-2023-47263 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2023-47263 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-47263?
- CVE-2023-47263 primarily affects Withsecure Client Security. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2023-47263?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2023-47263 published?
- CVE-2023-47263 was published on 2023-11-16 and last updated on 2026-06-17.
References
Affected products (7)
- cpe:2.3:a:withsecure:client_security:15:*:*:*:*:*:*:*
- cpe:2.3:a:withsecure:elements_endpoint_protection:*:*:*:*:*:*:*:*
- cpe:2.3:a:withsecure:email_and_server_security:15:*:*:*:*:*:*:*
- cpe:2.3:a:withsecure:server_security:15:*:*:*:*:*:*:*
- cpe:2.3:a:withsecure:linux_protection:12.0:*:*:*:*:*:*:*
- cpe:2.3:a:withsecure:linux_security_64:12.0:*:*:*:*:*:*:*
- cpe:2.3:a:withsecure:atlant:*:*:*:*:*:*:*:*
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