Vulnerability identifier: #VU86621

Vulnerability risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-6398

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ATP series
Hardware solutions / Routers for home users
USG FLEX series
Client/Desktop applications / Antivirus software/Personal firewalls
USG FLEX 50W
Hardware solutions / Firmware
USG20W-VPN
Hardware solutions / Firmware
NWA110AX
Hardware solutions / Firmware
NWA210AX
Hardware solutions / Firmware
NWA1123ACv3
Hardware solutions / Firmware
WAC500
Hardware solutions / Firmware
WAC500H
Hardware solutions / Firmware
WAX510D
Hardware solutions / Firmware
WAX610D
Hardware solutions / Firmware
WAX650S
Hardware solutions / Firmware
NWA50AX-PRO
Hardware solutions / Routers & switches, VoIP, GSM, etc
NWA90AX-PRO
Hardware solutions / Routers & switches, VoIP, GSM, etc
NWA50AX
Hardware solutions / Routers & switches, VoIP, GSM, etc
NWA55AXE
Hardware solutions / Routers & switches, VoIP, GSM, etc
NWA90AX
Hardware solutions / Routers & switches, VoIP, GSM, etc
NWA220AX-6E
Hardware solutions / Routers & switches, VoIP, GSM, etc
WAX300H
Hardware solutions / Routers & switches, VoIP, GSM, etc
WAX620D-6E
Hardware solutions / Routers & switches, VoIP, GSM, etc
WAX630S
Hardware solutions / Routers & switches, VoIP, GSM, etc
WAX640S-6E
Hardware solutions / Routers & switches, VoIP, GSM, etc
WAX655E
Hardware solutions / Routers & switches, VoIP, GSM, etc
WBE660S
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: ZyXEL Communications Corp.

Description

The vulnerability allows a remote user to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation in the file upload binary. A remote administrator can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ATP series: 4.32 - 5.37 Patch 1

USG FLEX series: 4.50 - 5.37 Patch 1

USG FLEX 50W: 4.16 - 5.37 Patch 1

USG20W-VPN: 4.16 - 5.37 Patch 1

NWA50AX-PRO: 6.65(ACGE.1)

NWA90AX-PRO: 6.65(ACGF.1)

NWA50AX: 6.29(ABYW.3)

NWA55AXE: 6.29(ABZL.3)

NWA90AX: 6.29(ACCV.3)

NWA110AX: 6.65(ABTG.1)

NWA210AX: 6.65(ABTD.1)

NWA220AX-6E: 6.65(ACCO.1)

NWA1123ACv3: 6.65(ABVT.1)

WAC500: 6.65(ABVS.1)

WAC500H: 6.65(ABWA.1)

WAX300H: 6.60(ACHF.1)

WAX510D: 6.65(ABTF.1)

WAX610D: 6.65(ABTE.1)

WAX620D-6E: 6.65(ACCN.1)

WAX630S: 6.65(ABZD.1)

WAX640S-6E: 6.65(ACCM.1)

WAX650S: 6.65(ABRM.1)

WAX655E: 6.65(ACDO.1)

WBE660S: 6.65(ACGG.1)

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External links
http://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps-02-20-2024

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.