high
7.2
CWE
78 77
Advisory Published
Updated

CVE-2023-6398: OS Command Injection

First published: Tue Feb 20 2024(Updated: )

A post-authentication command injection vulnerability in the file upload binary in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware versions from 4.16 through 5.37 Patch 1, USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1, USG FLEX H series firmware versions from 1.10 through 1.10 Patch 1, NWA50AX firmware versions through 6.29(ABYW.3), WAC500 firmware versions through 6.65(ABVS.1), WAX300H firmware versions through 6.60(ACHF.1), and WBE660S firmware versions through 6.65(ACGG.1) could allow an authenticated attacker with administrator privileges to execute some operating system (OS) commands on an affected device via FTP.

Credit: security@zyxel.com.tw

Affected SoftwareAffected VersionHow to fix
Zyxel ATP series firmware>=4.32<5.37 Patch 1
Zyxel USG FLEX series firmware>=4.50<5.37 Patch 1
Zyxel USG FLEX 50(W) series firmware>=4.16<5.37 Patch 1
Zyxel USG 20w-VPN Firmware>=4.16<5.37 Patch 1
Zyxel USG FLEX h series firmware>=1.10<1.10 Patch 1
Zyxel NWA50AX-Pro firmware<=6.29(ABYW.3)
Zyxel WAC500H Firmware<=6.65(ABVS.1)
Zyxel WAX300H<=6.60(ACHF.1)
Zyxel WBE660S firmware<=6.65(ACGG.1)
All of
Any of
Zyxel ZyWall ATP100 Firmware>=4.32<5.37
Zyxel ZyWall ATP100 Firmware=5.37
Zyxel ZyWall ATP100 Firmware=5.37-patch1
Zyxel ATP100 Firmware
All of
Any of
Zyxel ATP100W Firmware>=4.32<5.37
Zyxel ATP100W Firmware=5.37
Zyxel ATP100W Firmware=5.37-patch1
Zyxel ATP100W Firmware
All of
Any of
Zyxel ATP200 firmware>=4.32<5.37
Zyxel ATP200 firmware=5.37
Zyxel ATP200 firmware=5.37-patch1
Zyxel Zywall ATP200
All of
Any of
Zyxel ATP500 Firmware>=4.32<5.37
Zyxel ATP500 Firmware=5.37
Zyxel ATP500 Firmware=5.37-patch1
Zyxel ATP500 Firmware
All of
Any of
Zyxel Zywall ATP700>=4.32<5.37
Zyxel Zywall ATP700=5.37
Zyxel Zywall ATP700=5.37-patch1
Zyxel ATP700 Firmware
All of
Any of
Zyxel Zywall ATP800 Firmware>=4.32<5.37
Zyxel Zywall ATP800 Firmware=5.37
Zyxel Zywall ATP800 Firmware=5.37-patch1
Zyxel Zywall ATP800 Firmware
All of
Any of
Zyxel USG Flex 100 firmware>=4.50<5.37
Zyxel USG Flex 100 firmware=5.37
Zyxel USG Flex 100 firmware=5.37-patch1
Zyxel USG Flex 100 firmware
All of
Any of
Zyxel USG FLEX 100ax firmware>=4.50<5.37
Zyxel USG FLEX 100ax firmware=5.37
Zyxel USG FLEX 100ax firmware=5.37-patch1
Zyxel USG FLEX 100ax firmware
All of
Any of
Zyxel USG FLEX 100ax firmware>=4.50<5.37
Zyxel USG FLEX 100ax firmware=5.37
Zyxel USG FLEX 100ax firmware=5.37-patch1
Zyxel USG Flex 100HP
All of
Any of
Zyxel USG FLEX 100w firmware>=4.50<5.37
Zyxel USG FLEX 100w firmware=5.37
Zyxel USG FLEX 100w firmware=5.37-patch1
Zyxel USG FLEX 100w firmware
All of
Any of
Zyxel USG FLEX firmware>=4.50<5.37
Zyxel USG FLEX firmware=5.37
Zyxel USG FLEX firmware=5.37-patch1
Zyxel USG FLEX 200 firmware
All of
Any of
Zyxel USG Flex 200HP Firmware>=4.50<5.37
Zyxel USG Flex 200HP Firmware=5.37
Zyxel USG Flex 200HP Firmware=5.37-patch1
Zyxel USG FLEX 200h firmware
All of
Any of
Zyxel USG Flex 200HP Firmware>=4.50<5.37
Zyxel USG Flex 200HP Firmware=5.37
Zyxel USG Flex 200HP Firmware=5.37-patch1
Zyxel USG Flex 200HP Firmware
All of
Any of
Zyxel USG FLEX 50(W) series firmware>=4.16<5.37
Zyxel USG FLEX 50(W) series firmware=5.37
Zyxel USG FLEX 50(W) series firmware=5.37-patch1
Zyxel USG FLEX 50w
All of
Any of
Zyxel USG FLEX firmware>=4.50<5.37
Zyxel USG FLEX firmware=5.37
Zyxel USG FLEX firmware=5.37-patch1
Zyxel USG FLEX 500 firmware
All of
Any of
Zyxel USG FLEX 500h>=4.50<5.37
Zyxel USG FLEX 500h=5.37
Zyxel USG FLEX 500h=5.37-patch1
Zyxel USG FLEX 500h firmware
All of
Any of
Zyxel USG FLEX 50w>=4.16<5.37
Zyxel USG FLEX 50w=5.37
Zyxel USG FLEX 50w=5.37-patch1
Zyxel USG FLEX 50(W) series firmware
All of
Any of
Zyxel USG FLEX firmware>=4.50<5.37
Zyxel USG FLEX firmware=5.37
Zyxel USG FLEX firmware=5.37-patch1
Zyxel USG FLEX 700 firmware
All of
Any of
Zyxel USG FLEX 700h firmware>=4.50<5.37
Zyxel USG FLEX 700h firmware=5.37
Zyxel USG FLEX 700h firmware=5.37-patch1
Zyxel USG FLEX 700h firmware
All of
Any of
Zyxel USG20W-VPN Firmware>=4.16<5.37
Zyxel USG20W-VPN Firmware=5.37
Zyxel USG20W-VPN Firmware=5.37-patch1
Zyxel USG20W-VPN Firmware
All of
Any of
Zyxel USG 20W-VPN Firmware>=4.16<5.37
Zyxel USG 20W-VPN Firmware=5.37
Zyxel USG 20W-VPN Firmware=5.37-patch1
Zyxel USG20W-VPN Firmware
All of
Any of
Zyxel UOS=1.10
Zyxel UOS=1.10-patch1
Any of
Zyxel USG Flex 100HP
Zyxel USG Flex 100HP
Zyxel USG FLEX 200h firmware
Zyxel USG Flex 200HP Firmware
Zyxel USG FLEX 500h firmware
Zyxel USG FLEX 700h firmware
All of
Zyxel NWA50AX-Pro firmware<6.29\(abyw.4\)
Zyxel NWA50AX-PRO
All of
Zyxel NWA55AXE Firmware<6.29\(abzl.4\)
Zyxel NWA55AXE Firmware
All of
Zyxel NWA90AX Pro Firmware<6.29\(accv.4\)
Zyxel NWA90AX Firmware
All of
Zyxel NWA110AX<6.70\(abtg.2\)
Zyxel NWA110AX firmware
All of
Zyxel NWA210AX<6.70\(abtd.2\)
Zyxel NWA210AX Firmware
All of
Zyxel NWA220AX-6E Firmware<6.70\(acco.1\)
Zyxel NWA220AX-6E Firmware
All of
Zyxel NWA1123-AC PRO firmware<6.70\(abvt.1\)
Zyxel NWA1123-AC PRO firmware
All of
Zyxel WAC500H Firmware<6.70\(abvs.1\)
Zyxel WAC500 firmware
All of
Zyxel WAC500H Firmware<6.70\(abwa.1\)
Zyxel WAC500H Firmware
All of
Zyxel WAX300H<6.70\(achf.1\)
Zyxel WAX300H firmware
All of
Zyxel WAX510D firmware<6.70\(abtf.2\)
Zyxel WAX510D firmware
All of
Zyxel WAX610D<6.70\(abte.2\)
Zyxel WAX610D Firmware
All of
Zyxel WAX620D-6E<6.70\(accn.1\)
Zyxel WAX620D-6E Firmware
All of
Zyxel WAX630S Firmware<6.70\(abzd.2\)
Zyxel WAX630S Firmware
All of
Zyxel WAX640S-6E<6.70\(accm.1\)
Zyxel WAX640S-6E Firmware
All of
Zyxel WAX650S Firmware<6.70\(abrm.2\)
Zyxel WAX650S Firmware
All of
Zyxel WAX655E Firmware<6.70\(acdo.1\)
Zyxel WAX655E Firmware
All of
Zyxel WBE660S firmware<6.70\(acgg.2\)
Zyxel WBE660S firmware
All of
Zyxel NWA50AX Pro<6.80\(acge.0\)
Zyxel NWA50AX Pro
All of
Zyxel NWA90AX Pro Firmware<6.80\(acgf.0\)
Zyxel NWA90AX-PRO Firmware

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2023-6398?

    CVE-2023-6398 has a medium severity level as it allows post-authentication command injection in affected Zyxel devices.

  • How do I fix CVE-2023-6398?

    To mitigate CVE-2023-6398, update the firmware of your Zyxel device to the latest version that addresses this vulnerability.

  • Which devices are affected by CVE-2023-6398?

    CVE-2023-6398 affects multiple Zyxel ATP and USG FLEX series firmware versions from 4.32 to 5.37 Patch 1.

  • What is the nature of the vulnerability in CVE-2023-6398?

    CVE-2023-6398 is a post-authentication command injection vulnerability that can be exploited after a user logs into the system.

  • Is there a patch available for CVE-2023-6398?

    Yes, patches have been released for CVE-2023-6398, and users should ensure their devices are updated to the patched firmware.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203