CVE-2023-5593

HIGH

Zyxel SecuExtender SSL VPN Client 4.0.4.0 - Authenticated Privilege Escalation via Crafted CREATE Message

Title source: llm

Description

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.

References (1)

Core 1

Core References

Patch, Vendor Advisory vendor-advisory

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-out-of-bounds-write-vulnerability-in-secuextender-ssl-vpn-client-software

Scores

CVSS v3 7.8

EPSS 0.0006

EPSS Percentile 20.2%

Attack Vector LOCAL

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-787

Status published

Products (1)

zyxel/secuextender_ssl_vpn 4.0.4.0

Published Nov 20, 2023

Tracked Since Feb 18, 2026