Buffer overflow in ZyXEL Communications Corp. products - #VU48673

Vulnerability identifier: #VU48673

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: N/A

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the "fbwifi_continue" CGI program. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

VPN series
USG series
USG FLEX series
Unified Pro series
Unified series
Standalone series

Install updates from vendor's website.

VPN series - addressed in versions 4.39 week38, 10.03 patch 1
USG series - update to 4.39 week38
USG FLEX series - update to 4.55 week38
Unified Pro series - update to 6.10 patch 8
Unified series - update to 6.10 patch 8
Standalone series - update to 6.10 patch 8

• https://www.zyxel.com/support/Zyxel-security-advisory-for-buffer-overflow-vulnerability.shtml

• Remote code execution in Zyxel firewalls and access points