CVE-2022-26531
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.1epss 5.7%
exploitation probability
5.7%top 8% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Affected products
Zyxel · ATP series firmwareZyxel · NAP203 firmwareZyxel · NSG series firmwareZyxel · NWA50AX firmwareZyxel · NXC2500 firmwareZyxel · USG FLEX series firmwareZyxel · USG/ZyWALL series firmwareZyxel · VPN series firmwareZyxel · WAC500 firmwareZyxel · WAX510D firmwareReferences
http://packetstormsecurity.com/files/167464/Zyxel-Buffer-Overflow-Format-String-Command-Injection.htmlhttp://packetstormsecurity.com/files/177036/Zyxel-zysh-Format-String-Proof-Of-Concept.htmlhttp://seclists.org/fulldisclosure/2022/Jun/15https://www.zyxel.com/support/multiple-vulnerabilities-of-firewalls-AP-controllers-and-APs.shtml