What is the CVSS score of CVE-2023-5593?

CVE-2023-5593 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Is there a patch available for CVE-2023-5593?

Yes, a patch is available for CVE-2023-5593. Update the affected software to the latest version immediately.

Secuextender Ssl Vpn CVE-2023-5593

HIGH

Out-of-bounds Write (CWE-787)

2023-11-20 security@zyxel.com.tw

Memory Corruption Buffer Overflow Privilege Escalation Microsoft Secuextender Ssl Vpn

7.8

CVSS 3.1 · Vendor: zyxel

Severity by source

Vendor (zyxel) PRIMARY

7.8 HIGH

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

Primary rating from Vendor (zyxel) · only source for this CVE.

CVSS VectorVendor: zyxel

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Nov 20, 2023 - 12:15 cve.org

HIGH 7.8

DescriptionCVE.org

The out-of-bounds write vulnerability in the Windows-based SecuExtender SSL VPN Client software version 4.0.4.0 could allow an authenticated local user to gain a privilege escalation by sending a crafted CREATE message.

AnalysisAI

Technical ContextAI

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. The out-of-bounds write vulnerability in the Windows-based SecuExtender SSL VPN Client software version 4.0.4.0 could allow an authenticated local user to gain a privilege escalation by sending a crafted CREATE message. Affected products include: Zyxel Secuextender Ssl Vpn. Version information: version 4.0.4.0.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).