medium
6.5
CWE
359
Advisory Published
Updated

CVE-2023-22918

First published: Mon Apr 24 2023(Updated: )

A post-authentication information exposure vulnerability in the CGI program of Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.16 through 5.35, USG20(W)-VPN firmware versions 4.16 through 5.35, VPN series firmware versions 4.30 through 5.35, NWA110AX firmware version 6.50(ABTG.2) and earlier versions, WAC500 firmware version 6.50(ABVS.0) and earlier versions, and WAX510D firmware version 6.50(ABTF.2) and earlier versions, which could allow a remote authenticated attacker to retrieve encrypted information of the administrator on an affected device.

Credit: security@zyxel.com.tw

Affected SoftwareAffected VersionHow to fix
Zyxel ATP200 firmware>=4.32<5.36
Zyxel Zywall ATP200
Zyxel ZyWall ATP100 Firmware>=4.32<5.36
Zyxel ATP100 Firmware
Zyxel Zywall ATP700 Firmware>=4.32<5.36
Zyxel ATP700 Firmware
Zyxel ATP500 Firmware>=4.32<5.36
Zyxel ATP500 Firmware
Zyxel ATP100W Firmware>=4.32<5.36
Zyxel ATP100W Firmware
Zyxel ATP800>=4.32<5.36
Zyxel ATP800 Firmware
Zyxel USG Flex 100 firmware>=4.50<5.36
Zyxel USG FLEX 100
Zyxel USG FLEX 50(W) series firmware>=4.50<5.36
Zyxel USG FLEX 50
Zyxel USG FLEX firmware>=4.50<5.36
Zyxel USG FLEX 200 firmware
Zyxel USG FLEX firmware>=4.50<5.36
Zyxel USG FLEX 500 firmware
Zyxel USG FLEX firmware>=4.50<5.36
Zyxel USG FLEX 700 firmware
Zyxel USG FLEX 100w firmware>=4.50<5.36
Zyxel USG FLEX 100w firmware
Zyxel USG 20w-VPN Firmware>=4.16<5.36
Zyxel USG20
Zyxel USG FLEX 50w>=4.16<5.36
Zyxel USG FLEX 50(W) series firmware
Zyxel USG20-VPN>=4.30<5.36
Zyxel USG20
Zyxel VPN100>=4.30<5.36
Zyxel VPN100 Firmware
Zyxel VPN1000 Firmware>=4.30<5.36
Zyxel VPN1000 Firmware
Zyxel Zywall VPN 300 Firmware>=4.30<5.36
Zyxel Zywall VPN300
Zyxel Zywall VPN 50 Firmware>=4.30<5.36
Zyxel VPN50 Firmware
Zyxel NAP203 Firmware<=6.28\(abfa.0\)
Zyxel NAP203 firmware
Zyxel NAP303<=6.28\(abex.0\)
Zyxel NAP303
Zyxel NAP353<=6.28\(abey.0\)
Zyxel NAP353 Firmware
Zyxel NWA110AX firmware<=6.50\(abtg.2\)
Zyxel NWA110AX
Zyxel NWA1123-AC-HD Firmware<=6.25\(abin.9\)
Zyxel NWA5123-AC HD Firmware
Zyxel NWA1123-AC PRO firmware<=6.28\(abhd.0\)
Zyxel NWA1123-AC-PRO Firmware
Zyxel NWA1123-AC PRO firmware<=6.50\(abvt.0\)
Zyxel NWA1123-AC PRO firmware
Zyxel NWA210AX<=6.50\(abtd.2\)
Zyxel NWA210AX Firmware
Zyxel nwa220ax-6e firmware<=6.50\(acco.2\)
Zyxel NWA220AX-6E
Zyxel NWA50AX-Pro firmware<=6.55\(acge.1\)
Zyxel NWA50AX-PRO
Zyxel NWA50AX Pro<=6.50\(acge.0\)
Zyxel NWA50AX-Pro firmware
Zyxel NWA5123-AC HD<=6.25\(abim.9\)
Zyxel NWA5123-AC HD Firmware
Zyxel NWA55AXE Firmware<=6.29\(abzl.1\)
Zyxel NWA55AXE Firmware
Zyxel NWA90AX Pro Firmware<=6.29\(accv.1\)
Zyxel NWA90AX Firmware
Zyxel NWA90AX Pro Firmware<=6.50\(acgf.0\)
Zyxel NWA90AX-PRO Firmware
Zyxel WAC500H Firmware<=6.50\(abvs.0\)
Zyxel WAC500 firmware
Zyxel WAC500H Firmware<=6.50\(abwa.0\)
Zyxel WAC500H Firmware
Zyxel WAC5302D-SV2<=6.25\(abvz.9\)
Zyxel WAC5302D-SV2 Firmware
Zyxel WAC6103D-I<=6.28\(aaxh.0\)
Zyxel WAC6103D-I Firmware
Zyxel WAC6303D-S<=6.25\(abgl.9\)
Zyxel WAC6303D-S firmware
Zyxel WAC6502D-S<=6.28\(aasd.0\)
Zyxel WAC6502D-E Firmware
Zyxel WAC6502D-S<=6.28\(aase.0\)
Zyxel WAC6502D-S Firmware
Zyxel WAC6503D-S Firmware<=6.28\(aasf.0\)
Zyxel WAC6503D-S Firmware
Zyxel WAC6552D-S Firmware<=6.28\(abio.0\)
Zyxel WAC6552D-S Firmware
Zyxel WAC6553D-E<=6.28\(aasg.0\)
Zyxel WAC6553D-E
Zyxel WAX510D firmware<=6.50\(abtf.2\)
Zyxel WAX510D firmware
Zyxel WAX610D<=6.50\(abte.2\)
Zyxel WAX610D Firmware
Zyxel WAX620D-6E<=6.50\(accn.2\)
Zyxel WAX620D-6E Firmware
Zyxel WAX630S Firmware<=6.50\(abzd.2\)
Zyxel WAX630S Firmware
Zyxel WAX640S-6E<=6.50\(accm.2\)
Zyxel WAX640S-6E Firmware
Zyxel wax650s firmware<=6.50\(abrm.2\)
Zyxel WAX650S
Zyxel WAX655E Firmware<=6.50\(acdo.2\)
Zyxel WAX655E Firmware

Remedy

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2023-22918?

    CVE-2023-22918 has been classified as a medium severity vulnerability.

  • How can I fix CVE-2023-22918?

    To mitigate CVE-2023-22918, upgrade affected Zyxel devices to the latest firmware versions provided by Zyxel.

  • Which Zyxel products are affected by CVE-2023-22918?

    CVE-2023-22918 affects multiple Zyxel products including ATP series, USG FLEX series, and USG 20W-VPN firmware versions from 4.32 to 5.35.

  • What type of vulnerability is CVE-2023-22918?

    CVE-2023-22918 is a post-authentication information exposure vulnerability in Zyxel CGI programs.

  • Is CVE-2023-22918 actively being exploited?

    As of now, there is no reported active exploitation of CVE-2023-22918.

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