Missing Authorization in ZyXEL Communications Corp. products - CVE-2026-4795
Published: May 26, 2026
Vulnerability identifier: #VU132296
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-4795
CWE-ID: CWE-862
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: ZyXEL Communications Corp.
Affected software:
GS1200-5v3
GS1200-8v3
GS1200-5HPv3
GS1200-8HPv3
GS1200-10v3
GS1200-5v3
GS1200-8v3
GS1200-5HPv3
GS1200-8HPv3
GS1200-10v3
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass authorization checks.
The vulnerability exists due to missing authorization. A remote attacker on the local network can send a specially crafted HTTP request and read the system configuration from a log file.
How to mitigate CVE-2026-4795
Install updates from vendor's website.