{"id":"CVE-2022-26531","state":"PUBLISHED","title":"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","description":"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.","publishedAt":"2022-05-24T00:00:00.000Z","updatedAt":"2024-08-03T05:03:33.155Z","severity":{"score":6.1,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","source":"Zyxel"},"assigner":"Zyxel","products":["Zyxel USG/ZyWALL series firmware","Zyxel USG FLEX series firmware","Zyxel ATP series firmware","Zyxel VPN series firmware","Zyxel NSG series firmware","Zyxel NXC2500 firmware","Zyxel NAP203 firmware","Zyxel NWA50AX firmware","Zyxel WAC500 firmware","Zyxel WAX510D firmware"],"affected":[{"vendor":"Zyxel","product":"USG/ZyWALL series firmware","versions":[{"version":"4.09 through 4.71","status":"affected"}]},{"vendor":"Zyxel","product":"USG FLEX series firmware","versions":[{"version":"4.50 through 5.21","status":"affected"}]},{"vendor":"Zyxel","product":"ATP series firmware","versions":[{"version":"4.32 through 5.21","status":"affected"}]},{"vendor":"Zyxel","product":"VPN series firmware","versions":[{"version":"4.30 through 5.21","status":"affected"}]},{"vendor":"Zyxel","product":"NSG series firmware","versions":[{"version":"1.00 through 1.33 Patch 4","status":"affected"}]},{"vendor":"Zyxel","product":"NXC2500 firmware","versions":[{"version":"<= 6.10(AAIG.3)","status":"affected"}]},{"vendor":"Zyxel","product":"NAP203 firmware","versions":[{"version":"<= 6.25(ABFA.7)","status":"affected"}]},{"vendor":"Zyxel","product":"NWA50AX firmware","versions":[{"version":"<= 6.25(ABYW.5)","status":"affected"}]},{"vendor":"Zyxel","product":"WAC500 firmware","versions":[{"version":"<= 6.30(ABVS.2)","status":"affected"}]},{"vendor":"Zyxel","product":"WAX510D firmware","versions":[{"version":"<= 6.30(ABTF.2)","status":"affected"}]}],"references":["https://www.zyxel.com/support/multiple-vulnerabilities-of-firewalls-AP-controllers-and-APs.shtml","http://seclists.org/fulldisclosure/2022/Jun/15","http://packetstormsecurity.com/files/167464/Zyxel-Buffer-Overflow-Format-String-Command-Injection.html","http://packetstormsecurity.com/files/177036/Zyxel-zysh-Format-String-Proof-Of-Concept.html"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T19:49:49.689Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/26xxx/CVE-2022-26531.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2022-26531","state":"PUBLISHED","datePublished":"2022-05-24T00:00:00.000Z","dateUpdated":"2024-08-03T05:03:33.155Z","assignerShortName":"Zyxel","assignerOrgId":"96e50032-ad0d-4058-a115-4d2c13821f9f","dateReserved":"2022-03-07T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"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":[{"vendor":"Zyxel","product":"USG/ZyWALL series firmware","versions":[{"version":"4.09 through 4.71","status":"affected"}]},{"vendor":"Zyxel","product":"USG FLEX series firmware","versions":[{"version":"4.50 through 5.21","status":"affected"}]},{"vendor":"Zyxel","product":"ATP series firmware","versions":[{"version":"4.32 through 5.21","status":"affected"}]},{"vendor":"Zyxel","product":"VPN series firmware","versions":[{"version":"4.30 through 5.21","status":"affected"}]},{"vendor":"Zyxel","product":"NSG series firmware","versions":[{"version":"1.00 through 1.33 Patch 4","status":"affected"}]},{"vendor":"Zyxel","product":"NXC2500 firmware","versions":[{"version":"<= 6.10(AAIG.3)","status":"affected"}]},{"vendor":"Zyxel","product":"NAP203 firmware","versions":[{"version":"<= 6.25(ABFA.7)","status":"affected"}]},{"vendor":"Zyxel","product":"NWA50AX firmware","versions":[{"version":"<= 6.25(ABYW.5)","status":"affected"}]},{"vendor":"Zyxel","product":"WAC500 firmware","versions":[{"version":"<= 6.30(ABVS.2)","status":"affected"}]},{"vendor":"Zyxel","product":"WAX510D firmware","versions":[{"version":"<= 6.30(ABTF.2)","status":"affected"}]}],"references":[{"url":"https://www.zyxel.com/support/multiple-vulnerabilities-of-firewalls-AP-controllers-and-APs.shtml"},{"url":"http://seclists.org/fulldisclosure/2022/Jun/15","name":"20220610 HNS-2022-02 - HN Security Advisory - Multiple vulnerabilities in Zyxel zysh","tags":["mailing-list"]},{"url":"http://packetstormsecurity.com/files/167464/Zyxel-Buffer-Overflow-Format-String-Command-Injection.html"},{"url":"http://packetstormsecurity.com/files/177036/Zyxel-zysh-Format-String-Proof-Of-Concept.html"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"HIGH","baseScore":6.1,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","type":"CWE","lang":"en","description":"CWE-20: Improper Input Validation"}]}],"providerMetadata":{"shortName":"Zyxel","orgId":"96e50032-ad0d-4058-a115-4d2c13821f9f","dateUpdated":"2024-02-09T18:05:56.732Z"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://www.zyxel.com/support/multiple-vulnerabilities-of-firewalls-AP-controllers-and-APs.shtml","tags":["x_transferred"]},{"url":"http://seclists.org/fulldisclosure/2022/Jun/15","name":"20220610 HNS-2022-02 - HN Security Advisory - Multiple vulnerabilities in Zyxel zysh","tags":["mailing-list","x_transferred"]},{"url":"http://packetstormsecurity.com/files/167464/Zyxel-Buffer-Overflow-Format-String-Command-Injection.html","tags":["x_transferred"]},{"url":"http://packetstormsecurity.com/files/177036/Zyxel-zysh-Format-String-Proof-Of-Concept.html","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T05:03:33.155Z"}}]}}}