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CVE-2023-22916 Details

Description

The configuration parser of Zyxel ATP series firmware versions 5.10 through 5.35, USG FLEX series firmware versions 5.00 through 5.35, USG FLEX 50(W) firmware versions 5.10 through 5.35, USG20(W)-VPN firmware versions 5.10 through 5.35, and VPN series firmware versions 5.00 through 5.35, which fails to properly sanitize user input. A remote unauthenticated attacker could leverage the vulnerability to modify device configuration data, resulting in DoS conditions on an affected device if the attacker could trick an authorized administrator to switch the management mode to the cloud mode.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

CNA: [email protected]CVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps	CVE	Vendor Advisory
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information to Classify Weakness	[email protected]
CWE-20	Improper Input Validation	[email protected]

Affected Products

Product	Versions
zyxel usg flex 100 firmware	>= 5.00, <= 5.35
CPE cpe:2.3:o:zyxel:usg_flex_100_firmware:::::::: Remediation No remediation found in references.
zyxel usg flex 100	All versions
CPE cpe:2.3:h:zyxel:usg_flex_100:-:::::::* Remediation No remediation found in references.
zyxel usg flex 100w firmware	>= 5.00, <= 5.35
CPE cpe:2.3:o:zyxel:usg_flex_100w_firmware:::::::: Remediation No remediation found in references.
zyxel usg flex 100w	All versions
CPE cpe:2.3:h:zyxel:usg_flex_100w:-:::::::* Remediation No remediation found in references.
zyxel usg flex 200 firmware	>= 5.00, <= 5.35
CPE cpe:2.3:o:zyxel:usg_flex_200_firmware:::::::: Remediation No remediation found in references.
zyxel usg flex 200	All versions
CPE cpe:2.3:h:zyxel:usg_flex_200:-:::::::* Remediation No remediation found in references.
zyxel usg flex 50 firmware	>= 5.00, <= 5.35
CPE cpe:2.3:o:zyxel:usg_flex_50_firmware:::::::: Remediation No remediation found in references.
zyxel usg flex 50	All versions
CPE cpe:2.3:h:zyxel:usg_flex_50:-:::::::* Remediation No remediation found in references.
zyxel usg flex 50w firmware	>= 5.10, <= 5.35
CPE cpe:2.3:o:zyxel:usg_flex_50w_firmware:::::::: Remediation No remediation found in references.
zyxel usg flex 50w	All versions
CPE cpe:2.3:h:zyxel:usg_flex_50w:-:::::::* Remediation No remediation found in references.
zyxel usg flex 500 firmware	>= 5.00, <= 5.35
CPE cpe:2.3:o:zyxel:usg_flex_500_firmware:::::::: Remediation No remediation found in references.
zyxel usg flex 500	All versions
CPE cpe:2.3:h:zyxel:usg_flex_500:-:::::::* Remediation No remediation found in references.
zyxel usg flex 700 firmware	>= 5.00, <= 5.35
CPE cpe:2.3:o:zyxel:usg_flex_700_firmware:::::::: Remediation No remediation found in references.
zyxel usg flex 700	All versions
CPE cpe:2.3:h:zyxel:usg_flex_700:-:::::::* Remediation No remediation found in references.
zyxel vpn100 firmware	>= 5.00, <= 5.35
CPE cpe:2.3:o:zyxel:vpn100_firmware:::::::: Remediation No remediation found in references.
zyxel vpn100	All versions
CPE cpe:2.3:h:zyxel:vpn100:-:::::::* Remediation No remediation found in references.
zyxel vpn1000 firmware	>= 5.00, <= 5.35
CPE cpe:2.3:o:zyxel:vpn1000_firmware:::::::: Remediation No remediation found in references.
zyxel vpn1000	All versions
CPE cpe:2.3:h:zyxel:vpn1000:-:::::::* Remediation No remediation found in references.
zyxel vpn300 firmware	>= 5.00, <= 5.35
CPE cpe:2.3:o:zyxel:vpn300_firmware:::::::: Remediation No remediation found in references.
zyxel vpn300	All versions
CPE cpe:2.3:h:zyxel:vpn300:-:::::::* Remediation No remediation found in references.
zyxel vpn50 firmware	>= 5.00, <= 5.35
CPE cpe:2.3:o:zyxel:vpn50_firmware:::::::: Remediation No remediation found in references.
zyxel vpn50	All versions
CPE cpe:2.3:h:zyxel:vpn50:-:::::::* Remediation No remediation found in references.
zyxel usg 20w-vpn firmware	>= 5.10, <= 5.35
CPE cpe:2.3:o:zyxel:usg_20w-vpn_firmware:::::::: Remediation No remediation found in references.
zyxel usg 20w-vpn	All versions
CPE cpe:2.3:h:zyxel:usg_20w-vpn:-:::::::* Remediation No remediation found in references.
zyxel atp100 firmware	>= 5.10, <= 5.35
CPE cpe:2.3:o:zyxel:atp100_firmware:::::::: Remediation No remediation found in references.
zyxel atp100	All versions
CPE cpe:2.3:h:zyxel:atp100:-:::::::* Remediation No remediation found in references.
zyxel atp100w firmware	>= 5.10, <= 5.35
CPE cpe:2.3:o:zyxel:atp100w_firmware:::::::: Remediation No remediation found in references.
zyxel atp100w	All versions
CPE cpe:2.3:h:zyxel:atp100w:-:::::::* Remediation No remediation found in references.
zyxel atp200 firmware	>= 5.10, <= 5.35
CPE cpe:2.3:o:zyxel:atp200_firmware:::::::: Remediation No remediation found in references.
zyxel atp200	All versions
CPE cpe:2.3:h:zyxel:atp200:-:::::::* Remediation No remediation found in references.
zyxel atp500 firmware	>= 5.10, <= 5.35
CPE cpe:2.3:o:zyxel:atp500_firmware:::::::: Remediation No remediation found in references.
zyxel atp500	All versions
CPE cpe:2.3:h:zyxel:atp500:-:::::::* Remediation No remediation found in references.
zyxel atp700 firmware	>= 5.10, <= 5.35
CPE cpe:2.3:o:zyxel:atp700_firmware:::::::: Remediation No remediation found in references.
zyxel atp700	All versions
CPE cpe:2.3:h:zyxel:atp700:-:::::::* Remediation No remediation found in references.
zyxel atp800 firmware	>= 5.10, <= 5.35
CPE cpe:2.3:o:zyxel:atp800_firmware:::::::: Remediation No remediation found in references.
zyxel atp800	All versions
CPE cpe:2.3:h:zyxel:atp800:-:::::::* Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
May 4, 2023	Initial Analysis	[email protected]

CVE-2023-22916 Details

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