CVE-2022-26531: Input Validation
Published May 24, 2022
·Updated
Multiple improper input validation flaws were identified in some CLI commands of Zyxel USG/ZyWALL series firmware versions 4.09 through 4.71, USG FLEX series firmware versions 4.50 through 5.21, ATP series firmware versions 4.32 through 5.21, VPN series firmware versions 4.30 through 5.21, NSG series firmware versions 1.00 through 1.33 Patch 4, NXC2500 firmware version 6.10(AAIG.3) and earlier versions, NAP203 firmware version 6.25(ABFA.7) and earlier versions, NWA50AX firmware version 6.25(ABYW.5) and earlier versions, WAC500 firmware version 6.30(ABVS.2) and earlier versions, and WAX510D firmware version 6.30(ABTF.2) and earlier versions, that could allow a local authenticated attacker to cause a buffer overflow or a system crash via a crafted payload.
Affected Software
290 affected components
Zyxel Vpn100 Firmware>=4.30<=5.21
Zyxel Vpn100
Zyxel Vpn1000 Firmware>=4.30<=5.21
Zyxel Vpn1000
Zyxel Vpn300 Firmware>=4.30<=5.21
Zyxel Vpn300
Zyxel Vpn50 Firmware>=4.30<=5.21
Zyxel Vpn50
Zyxel Atp100 Firmware>=4.32<=5.21
Zyxel Atp100
Zyxel Atp100w Firmware>=4.32<=5.21
Zyxel Atp100w
Zyxel Atp200 Firmware>=4.32<=5.21
Zyxel ATP200
Zyxel Atp500 Firmware>=4.32<=5.21
Zyxel ATP500
Zyxel Atp700 Firmware>=4.32<=5.21
Zyxel Atp700
Zyxel Atp800 Firmware>=4.32<=5.21
Zyxel ATP800
Zyxel Usg 110 Firmware>=4.09<=4.71
Zyxel Usg 110
Zyxel Usg 1100 Firmware>=4.09<=4.71
Zyxel Usg 1100
Zyxel Usg 1900 Firmware>=4.09<=4.71
Zyxel Usg 1900
Zyxel Usg 20w Firmware>=4.09<=4.71
Zyxel Usg 20w
Zyxel Usg 20w-vpn Firmware>=4.09<=4.71
Zyxel Usg 20w-vpn
Zyxel Usg 2200-vpn Firmware>=4.09<=4.71
Zyxel Usg 2200-vpn
Zyxel Usg 310 Firmware>=4.09<=4.71
Zyxel Usg 310
Zyxel Usg 40 Firmware>=4.09<=4.71
Zyxel Usg 40
Zyxel Usg 40w Firmware>=4.09<=4.71
Zyxel Usg 40w
Zyxel Usg 60 Firmware>=4.09<=4.71
Zyxel Usg 60
Zyxel Usg 60w Firmware>=4.09<=4.71
Zyxel Usg 60w
Zyxel Usg Flex 100 Firmware>=4.50<=5.21
Zyxel Usg Flex 100
Zyxel Usg Flex 100w Firmware>=4.50<=5.21
Zyxel Usg Flex 100w
Zyxel USG FLEX 200 firmware>=4.50<=5.21
Zyxel USG FLEX 200
Zyxel USG FLEX 500 firmware>=4.50<=5.21
Zyxel USG FLEX 500
Zyxel USG FLEX 700 firmware>=4.50<=5.21
Zyxel USG FLEX 700
Zyxel Usg200 Firmware>=4.09<=4.71
Zyxel Usg200
Zyxel Usg20 Firmware>=4.09<=4.71
Zyxel Usg20
Zyxel Usg210 Firmware>=4.09<=4.71
Zyxel USG210
Zyxel Usg2200 Firmware>=4.09<=4.71
Zyxel Usg2200
Zyxel Usg300 Firmware>=4.09<=4.71
Zyxel Usg300
Zyxel Usg310 Firmware>=4.09<=4.71
Zyxel USG310
Zyxel Nsg300 Firmware>=1.00<1.33
Zyxel Nsg300 Firmware=1.33
Zyxel Nsg300 Firmware=1.33-patch1
Zyxel Nsg300 Firmware=1.33-patch2
Zyxel Nsg300 Firmware=1.33-patch3
Zyxel Nsg300 Firmware=1.33-patch4
Zyxel Nsg300
Zyxel Nsg100 Firmware>=1.00<1.33
Zyxel Nsg100 Firmware=1.33
Zyxel Nsg100 Firmware=1.33-patch1
Zyxel Nsg100 Firmware=1.33-patch2
Zyxel Nsg100 Firmware=1.33-patch3
Zyxel Nsg100 Firmware=1.33-patch4
Zyxel Nsg100
Zyxel Nsg50 Firmware>=1.00<1.33
Zyxel Nsg50 Firmware=1.33
Zyxel Nsg50 Firmware=1.33-patch1
Zyxel Nsg50 Firmware=1.33-patch2
Zyxel Nsg50 Firmware=1.33-patch3
Zyxel Nsg50 Firmware=1.33-patch4
Zyxel Nsg50
Zyxel NXC2500 firmware<=6.10\(aaig.3\)
Zyxel NXC2500
Zyxel NXC5500 firmware<=6.10\(aaos.3\)
Zyxel NXC5500
Zyxel NAP203 firmware<=6.25\(abfa.7\)
Zyxel NAP203
Zyxel Nap303 Firmware<=6.25\(abex.7\)
Zyxel Nap303
Zyxel Nap353 Firmware<=6.25\(abey.7\)
Zyxel Nap353
Zyxel NWA50AX firmware<=6.25\(abyw.5\)
Zyxel NWA50AX
Zyxel Nwa55axe Firmware<=6.25\(abzl.5\)
Zyxel Nwa55axe
Zyxel Nwa90ax Firmware<=6.27\(accv.2\)
Zyxel Nwa90ax
Zyxel NWA110AX firmware<=6.30\(abtg.2\)
Zyxel NWA110AX
Zyxel Nwa210ax Firmware<=6.30\(abtd.2\)
Zyxel Nwa210ax
Zyxel Nwa1123-ac-hd Firmware<=6.25\(abin.6\)
Zyxel Nwa1123-ac-hd
Zyxel Nwa1123-ac-pro Firmware<=6.25\(abhd.7\)
Zyxel Nwa1123-ac-pro
Zyxel NWA1123ACv3 firmware<=6.30\(abvt.2\)
Zyxel NWA1123ACv3
Zyxel Nwa1302-ac Firmware<=6.25\(abku.6\)
Zyxel Nwa1302-ac
Zyxel Nwa5123-ac-hd Firmware<=6.25\(abim.6\)
Zyxel Nwa5123-ac-hd
Zyxel Wac500h Firmware<=6.30\(abwa.2\)
Zyxel Wac500h
Zyxel WAC500 firmware<=6.30\(abvs.2\)
Zyxel WAC500
Zyxel Wac5302d-s Firmware<=6.10\(abfh.10\)
Zyxel Wac5302d-s
Zyxel Wac5302d-sv2 Firmware<=6.25\(abvz.6\)
Zyxel Wac5302d-sv2
Zyxel Wac6103d-i Firmware<=6.25\(aaxh.7\)
Zyxel Wac6103d-i
Zyxel Wac6303d-s Firmware<=6.25\(abgl.6\)
Zyxel Wac6303d-s
Zyxel Wac6502d-e Firmware<=6.25\(aasd.7\)
Zyxel Wac6502d-e
Zyxel Wac6502d-s Firmware<=6.25\(aase.7\)
Zyxel Wac6502d-s
Zyxel Wac6503d-s Firmware<=6.25\(aasf.7\)
Zyxel Wac6503d-s
Zyxel Wac6553d-s Firmware<=6.25\(aasg.7\)
Zyxel Wac6553d-s
Zyxel Wac6552d-s Firmware<=6.25\(abio.7\)
Zyxel Wac6552d-s
Zyxel WAX510D firmware<=6.30\(abtf.2\)
Zyxel WAX510D
Zyxel Wax610d Firmware<=6.30\(abte.2\)
Zyxel Wax610d
Zyxel Wax630s Firmware<=6.30\(abzd.2\)
Zyxel Wax630s
Zyxel Wax650s Firmware<=6.30\(abrm.2\)
Zyxel Wax650s
All of the following
Zyxel Vpn100 Firmware>=4.30<=5.21
Zyxel Vpn100
All of the following
Zyxel Vpn1000 Firmware>=4.30<=5.21
Zyxel Vpn1000
All of the following
Zyxel Vpn300 Firmware>=4.30<=5.21
Zyxel Vpn300
All of the following
Zyxel Vpn50 Firmware>=4.30<=5.21
Zyxel Vpn50
All of the following
Zyxel Atp100 Firmware>=4.32<=5.21
Zyxel Atp100
All of the following
Zyxel Atp100w Firmware>=4.32<=5.21
Zyxel Atp100w
All of the following
Zyxel Atp200 Firmware>=4.32<=5.21
Zyxel ATP200
All of the following
Zyxel Atp500 Firmware>=4.32<=5.21
Zyxel ATP500
All of the following
Zyxel Atp700 Firmware>=4.32<=5.21
Zyxel Atp700
All of the following
Zyxel Atp800 Firmware>=4.32<=5.21
Zyxel ATP800
All of the following
Zyxel Usg 110 Firmware>=4.09<=4.71
Zyxel Usg 110
All of the following
Zyxel Usg 1100 Firmware>=4.09<=4.71
Zyxel Usg 1100
All of the following
Zyxel Usg 1900 Firmware>=4.09<=4.71
Zyxel Usg 1900
All of the following
Zyxel Usg 20w Firmware>=4.09<=4.71
Zyxel Usg 20w
All of the following
Zyxel Usg 20w-vpn Firmware>=4.09<=4.71
Zyxel Usg 20w-vpn
All of the following
Zyxel Usg 2200-vpn Firmware>=4.09<=4.71
Zyxel Usg 2200-vpn
All of the following
Zyxel Usg 310 Firmware>=4.09<=4.71
Zyxel Usg 310
All of the following
Zyxel Usg 40 Firmware>=4.09<=4.71
Zyxel Usg 40
All of the following
Zyxel Usg 40w Firmware>=4.09<=4.71
Zyxel Usg 40w
All of the following
Zyxel Usg 60 Firmware>=4.09<=4.71
Zyxel Usg 60
All of the following
Zyxel Usg 60w Firmware>=4.09<=4.71
Zyxel Usg 60w
All of the following
Zyxel Usg Flex 100 Firmware>=4.50<=5.21
Zyxel Usg Flex 100
All of the following
Zyxel Usg Flex 100w Firmware>=4.50<=5.21
Zyxel Usg Flex 100w
All of the following
Zyxel USG FLEX 200 firmware>=4.50<=5.21
Zyxel USG FLEX 200
All of the following
Zyxel USG FLEX 500 firmware>=4.50<=5.21
Zyxel USG FLEX 500
All of the following
Zyxel USG FLEX 700 firmware>=4.50<=5.21
Zyxel USG FLEX 700
All of the following
Zyxel Usg200 Firmware>=4.09<=4.71
Zyxel Usg200
All of the following
Zyxel Usg20 Firmware>=4.09<=4.71
Zyxel Usg20
All of the following
Zyxel Usg210 Firmware>=4.09<=4.71
Zyxel USG210
All of the following
Zyxel Usg2200 Firmware>=4.09<=4.71
Zyxel Usg2200
All of the following
Zyxel Usg300 Firmware>=4.09<=4.71
Zyxel Usg300
All of the following
Zyxel Usg310 Firmware>=4.09<=4.71
Zyxel USG310
All of the following
Any of the following
Zyxel Nsg300 Firmware>=1.00<1.33
Zyxel Nsg300 Firmware=1.33
Zyxel Nsg300 Firmware=1.33-patch1
Zyxel Nsg300 Firmware=1.33-patch2
Zyxel Nsg300 Firmware=1.33-patch3
Zyxel Nsg300 Firmware=1.33-patch4
Zyxel Nsg300
All of the following
Any of the following
Zyxel Nsg100 Firmware>=1.00<1.33
Zyxel Nsg100 Firmware=1.33
Zyxel Nsg100 Firmware=1.33-patch1
Zyxel Nsg100 Firmware=1.33-patch2
Zyxel Nsg100 Firmware=1.33-patch3
Zyxel Nsg100 Firmware=1.33-patch4
Zyxel Nsg100
All of the following
Any of the following
Zyxel Nsg50 Firmware>=1.00<1.33
Zyxel Nsg50 Firmware=1.33
Zyxel Nsg50 Firmware=1.33-patch1
Zyxel Nsg50 Firmware=1.33-patch2
Zyxel Nsg50 Firmware=1.33-patch3
Zyxel Nsg50 Firmware=1.33-patch4
Zyxel Nsg50
All of the following
Zyxel NXC2500 firmware<=6.10\(aaig.3\)
Zyxel NXC2500
All of the following
Zyxel NXC5500 firmware<=6.10\(aaos.3\)
Zyxel NXC5500
All of the following
Zyxel NAP203 firmware<=6.25\(abfa.7\)
Zyxel NAP203
All of the following
Zyxel Nap303 Firmware<=6.25\(abex.7\)
Zyxel Nap303
All of the following
Zyxel Nap353 Firmware<=6.25\(abey.7\)
Zyxel Nap353
All of the following
Zyxel NWA50AX firmware<=6.25\(abyw.5\)
Zyxel NWA50AX
All of the following
Zyxel Nwa55axe Firmware<=6.25\(abzl.5\)
Zyxel Nwa55axe
All of the following
Zyxel Nwa90ax Firmware<=6.27\(accv.2\)
Zyxel Nwa90ax
All of the following
Zyxel NWA110AX firmware<=6.30\(abtg.2\)
Zyxel NWA110AX
All of the following
Zyxel Nwa210ax Firmware<=6.30\(abtd.2\)
Zyxel Nwa210ax
All of the following
Zyxel Nwa1123-ac-hd Firmware<=6.25\(abin.6\)
Zyxel Nwa1123-ac-hd
All of the following
Zyxel Nwa1123-ac-pro Firmware<=6.25\(abhd.7\)
Zyxel Nwa1123-ac-pro
All of the following
Zyxel NWA1123ACv3 firmware<=6.30\(abvt.2\)
Zyxel NWA1123ACv3
All of the following
Zyxel Nwa1302-ac Firmware<=6.25\(abku.6\)
Zyxel Nwa1302-ac
All of the following
Zyxel Nwa5123-ac-hd Firmware<=6.25\(abim.6\)
Zyxel Nwa5123-ac-hd
All of the following
Zyxel Wac500h Firmware<=6.30\(abwa.2\)
Zyxel Wac500h
All of the following
Zyxel WAC500 firmware<=6.30\(abvs.2\)
Zyxel WAC500
All of the following
Zyxel Wac5302d-s Firmware<=6.10\(abfh.10\)
Zyxel Wac5302d-s
All of the following
Zyxel Wac5302d-sv2 Firmware<=6.25\(abvz.6\)
Zyxel Wac5302d-sv2
All of the following
Zyxel Wac6103d-i Firmware<=6.25\(aaxh.7\)
Zyxel Wac6103d-i
All of the following
Zyxel Wac6303d-s Firmware<=6.25\(abgl.6\)
Zyxel Wac6303d-s
All of the following
Zyxel Wac6502d-e Firmware<=6.25\(aasd.7\)
Zyxel Wac6502d-e
All of the following
Zyxel Wac6502d-s Firmware<=6.25\(aase.7\)
Zyxel Wac6502d-s
All of the following
Zyxel Wac6503d-s Firmware<=6.25\(aasf.7\)
Zyxel Wac6503d-s
All of the following
Zyxel Wac6553d-s Firmware<=6.25\(aasg.7\)
Zyxel Wac6553d-s
All of the following
Zyxel Wac6552d-s Firmware<=6.25\(abio.7\)
Zyxel Wac6552d-s
All of the following
Zyxel WAX510D firmware<=6.30\(abtf.2\)
Zyxel WAX510D
All of the following
Zyxel Wax610d Firmware<=6.30\(abte.2\)
Zyxel Wax610d
All of the following
Zyxel Wax630s Firmware<=6.30\(abzd.2\)
Zyxel Wax630s
All of the following
Zyxel Wax650s Firmware<=6.30\(abrm.2\)
Zyxel Wax650s
Event History
May 24, 2022
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
DescriptionSeverityWeakness
Frequently Asked Questions
1
What is the severity of CVE-2022-26531?
CVE-2022-26531 has been rated as high severity due to multiple improper input validation flaws that could allow unauthorized command execution.
2
How do I fix CVE-2022-26531?
To fix CVE-2022-26531, it is recommended to upgrade the affected firmware versions of Zyxel devices to the latest available versions.
3
Which Zyxel devices are affected by CVE-2022-26531?
CVE-2022-26531 affects various Zyxel devices, including the USG, ZyWALL, USG FLEX, and ATP series with specific firmware versions.
4
Can CVE-2022-26531 be exploited remotely?
Yes, CVE-2022-26531 can potentially be exploited remotely if the affected Zyxel devices are exposed to the internet.
5
Has Zyxel released any security patches for CVE-2022-26531?
Yes, Zyxel has released security patches to address CVE-2022-26531, and users are advised to apply these patches promptly.