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CVE-2023-33010 Details

Description

A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX series firmware versions 4.50 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.25 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.25 through 5.36 Patch 1, VPN series firmware versions 4.30 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.25 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-33010	CISA-ADP	US Government Resource
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-buffer-overflow-vulnerabilities-of-firewalls	CVE	Vendor Advisory
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-buffer-overflow-vulnerabilities-of-firewalls	[email protected]	Vendor Advisory

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability Name	Date Added	Due Date	Required Action
Zyxel Multiple Firewalls Buffer Overflow Vulnerability	Jun 5, 2023	Jun 26, 2023	Apply updates per vendor instructions.

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-120	Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')	[email protected]
CWE-120	Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')	[email protected]

Affected Products

Product	Versions
zyxel atp100 firmware	>= 4.32, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:atp100_firmware:::::::: cpe:2.3:o:zyxel:atp100_firmware:5.36:-:::::: cpe:2.3:o:zyxel:atp100_firmware:5.36:patch1:::::: Remediation No remediation found in references.
zyxel atp100	All versions
CPE cpe:2.3:h:zyxel:atp100:-:::::::* Remediation No remediation found in references.
zyxel atp200 firmware	>= 4.32, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:atp200_firmware:::::::: cpe:2.3:o:zyxel:atp200_firmware:5.36:-:::::: cpe:2.3:o:zyxel:atp200_firmware:5.36:patch1:::::: 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	>= 4.32, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:atp500_firmware:::::::: cpe:2.3:o:zyxel:atp500_firmware:5.36:-:::::: cpe:2.3:o:zyxel:atp500_firmware:5.36:patch1:::::: Remediation No remediation found in references.
zyxel atp500	All versions
CPE cpe:2.3:h:zyxel:atp500:-:::::::* Remediation No remediation found in references.
zyxel atp100w firmware	>= 4.32, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:atp100w_firmware:::::::: cpe:2.3:o:zyxel:atp100w_firmware:5.36:-:::::: cpe:2.3:o:zyxel:atp100w_firmware:5.36:patch1:::::: Remediation No remediation found in references.
zyxel atp100w	All versions
CPE cpe:2.3:h:zyxel:atp100w:-:::::::* Remediation No remediation found in references.
zyxel atp700 firmware	>= 4.32, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:atp700_firmware:::::::: cpe:2.3:o:zyxel:atp700_firmware:5.36:-:::::: cpe:2.3:o:zyxel:atp700_firmware:5.36:patch1:::::: 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	>= 4.32, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:atp800_firmware:::::::: cpe:2.3:o:zyxel:atp800_firmware:5.36:-:::::: cpe:2.3:o:zyxel:atp800_firmware:5.36:patch1:::::: Remediation No remediation found in references.
zyxel atp800	All versions
CPE cpe:2.3:h:zyxel:atp800:-:::::::* Remediation No remediation found in references.
zyxel usg flex 100 firmware	>= 4.50, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:usg_flex_100_firmware:::::::: cpe:2.3:o:zyxel:usg_flex_100_firmware:5.36:-:::::: cpe:2.3:o:zyxel:usg_flex_100_firmware:5.36:patch1:::::: 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 50 firmware	5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:usg_flex_50_firmware:5.36:-:::::: cpe:2.3:o:zyxel:usg_flex_50_firmware:5.36:patch1:::::: 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 200 firmware	>= 4.50, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:usg_flex_200_firmware:::::::: cpe:2.3:o:zyxel:usg_flex_200_firmware:5.36:-:::::: cpe:2.3:o:zyxel:usg_flex_200_firmware:5.36:patch1:::::: 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 500 firmware	>= 4.50, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:usg_flex_500_firmware:::::::: cpe:2.3:o:zyxel:usg_flex_500_firmware:5.36:-:::::: cpe:2.3:o:zyxel:usg_flex_500_firmware:5.36:patch1:::::: 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	>= 4.50, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:usg_flex_700_firmware:::::::: cpe:2.3:o:zyxel:usg_flex_700_firmware:5.36:-:::::: cpe:2.3:o:zyxel:usg_flex_700_firmware:5.36:patch1:::::: 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 usg flex 100w firmware	5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:usg_flex_100w_firmware:5.36:-:::::: cpe:2.3:o:zyxel:usg_flex_100w_firmware:5.36:patch1:::::: 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 50w firmware	>= 4.25, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:usg_flex_50w_firmware:::::::: cpe:2.3:o:zyxel:usg_flex_50w_firmware:5.36:-:::::: cpe:2.3:o:zyxel:usg_flex_50w_firmware:5.36:patch1:::::: 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 20w-vpn firmware	5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:usg_20w-vpn_firmware:5.36:-:::::: cpe:2.3:o:zyxel:usg_20w-vpn_firmware:5.36:patch1:::::: 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 vpn100 firmware	>= 4.30, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:vpn100_firmware:::::::: cpe:2.3:o:zyxel:vpn100_firmware:5.36:-:::::: cpe:2.3:o:zyxel:vpn100_firmware:5.36:patch1:::::: Remediation No remediation found in references.
zyxel vpn100	All versions
CPE cpe:2.3:h:zyxel:vpn100:-:::::::* Remediation No remediation found in references.
zyxel vpn50 firmware	>= 4.30, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:vpn50_firmware:::::::: cpe:2.3:o:zyxel:vpn50_firmware:5.36:-:::::: cpe:2.3:o:zyxel:vpn50_firmware:5.36:patch1:::::: Remediation No remediation found in references.
zyxel vpn50	All versions
CPE cpe:2.3:h:zyxel:vpn50:-:::::::* Remediation No remediation found in references.
zyxel vpn300 firmware	>= 4.30, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:vpn300_firmware:::::::: cpe:2.3:o:zyxel:vpn300_firmware:5.36:-:::::: cpe:2.3:o:zyxel:vpn300_firmware:5.36:patch1:::::: Remediation No remediation found in references.
zyxel vpn300	All versions
CPE cpe:2.3:h:zyxel:vpn300:-:::::::* Remediation No remediation found in references.
zyxel vpn1000 firmware	>= 4.30, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:vpn1000_firmware:::::::: cpe:2.3:o:zyxel:vpn1000_firmware:5.36:-:::::: cpe:2.3:o:zyxel:vpn1000_firmware:5.36:patch1:::::: Remediation No remediation found in references.
zyxel vpn1000	All versions
CPE cpe:2.3:h:zyxel:vpn1000:-:::::::* Remediation No remediation found in references.
zyxel usg20-vpn firmware	>= 4.30, < 5.36 5.36 - 5.36 patch1
CPE cpe:2.3:o:zyxel:usg20-vpn_firmware:::::::: cpe:2.3:o:zyxel:usg20-vpn_firmware:5.36:-:::::: cpe:2.3:o:zyxel:usg20-vpn_firmware:5.36:patch1:::::: Remediation No remediation found in references.
zyxel usg20-vpn	All versions
CPE cpe:2.3:h:zyxel:usg20-vpn:-:::::::* Remediation No remediation found in references.
zyxel usg 40 firmware	>= 4.25, < 4.73 4.73 - 4.73 patch1
CPE cpe:2.3:o:zyxel:usg_40_firmware:::::::: cpe:2.3:o:zyxel:usg_40_firmware:4.73:-:::::: cpe:2.3:o:zyxel:usg_40_firmware:4.73:patch1:::::: Remediation No remediation found in references.
zyxel usg 40	All versions
CPE cpe:2.3:h:zyxel:usg_40:-:::::::* Remediation No remediation found in references.
zyxel usg 40w firmware	>= 4.25, < 4.73 4.73 - 4.73 patch1
CPE cpe:2.3:o:zyxel:usg_40w_firmware:::::::: cpe:2.3:o:zyxel:usg_40w_firmware:4.73:-:::::: cpe:2.3:o:zyxel:usg_40w_firmware:4.73:patch1:::::: Remediation No remediation found in references.
zyxel usg 40w	All versions
CPE cpe:2.3:h:zyxel:usg_40w:-:::::::* Remediation No remediation found in references.
zyxel usg 60w firmware	>= 4.25, < 4.73 4.73 - 4.73 patch1
CPE cpe:2.3:o:zyxel:usg_60w_firmware:::::::: cpe:2.3:o:zyxel:usg_60w_firmware:4.73:-:::::: cpe:2.3:o:zyxel:usg_60w_firmware:4.73:patch1:::::: Remediation No remediation found in references.
zyxel usg 60w	All versions
CPE cpe:2.3:h:zyxel:usg_60w:-:::::::* Remediation No remediation found in references.
zyxel usg 60 firmware	>= 4.25, < 4.73 4.73 - 4.73 patch1
CPE cpe:2.3:o:zyxel:usg_60_firmware:::::::: cpe:2.3:o:zyxel:usg_60_firmware:4.73:-:::::: cpe:2.3:o:zyxel:usg_60_firmware:4.73:patch1:::::: Remediation No remediation found in references.
zyxel usg 60	All versions
CPE cpe:2.3:h:zyxel:usg_60:-:::::::* Remediation No remediation found in references.

Change History

12 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	CISA-ADP
Jun 17, 2026	CVE Modified	[email protected]
Oct 27, 2025	Modified Analysis	[email protected]
Oct 21, 2025	CVE Modified	CISA-ADP
Oct 21, 2025	CVE Modified	CISA-ADP
Oct 21, 2025	CVE Modified	CISA-ADP
Jan 27, 2025	Modified Analysis	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Jun 7, 2023	CPE Deprecation Remap	[email protected]
Jun 7, 2023	CPE Deprecation Remap	[email protected]
Jun 6, 2023	Initial Analysis	[email protected]

CVE-2023-33010 Details

Description

Metrics

References to Advisories, Solutions, and Tools

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

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