[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fkX6QjsJpEbhdbRUQ6BNE7ySb7uG60_tIKk_kYDRRvCc":3,"g5a-family:zyxel\u002Fusg20-vpn_firmware":148,"g5a-ex:zyxel\u002Fusg20-vpn_firmware@*":149},{"success":4,"data":5},true,{"product":6,"versions":40,"topVulnerabilitiesByEpss":51,"kevVulnerabilities":110,"seoMetadata":126,"meta":145},{"vendorName":7,"productName":8,"versionCount":9,"totalCves":10,"kevCount":11,"lastCveUpdate":12,"versions":13,"description":39},"zyxel","usg20-vpn_firmware",10,15,4,"2024-02-20",[14,18,20,23,25,27,29,31,33,36],{"version":15,"cve_count":16,"kev_count":16,"has_kev":17},"4.16",0,false,{"version":19,"cve_count":16,"kev_count":16,"has_kev":17},"4.30",{"version":21,"cve_count":22,"kev_count":16,"has_kev":17},"4.31",1,{"version":24,"cve_count":16,"kev_count":16,"has_kev":17},"4.35",{"version":26,"cve_count":16,"kev_count":16,"has_kev":17},"4.35\\(abaq.3\\)c0",{"version":28,"cve_count":22,"kev_count":22,"has_kev":4},"4.60",{"version":30,"cve_count":16,"kev_count":16,"has_kev":17},"5.01",{"version":32,"cve_count":16,"kev_count":16,"has_kev":17},"5.10",{"version":34,"cve_count":35,"kev_count":35,"has_kev":4},"5.36",2,{"version":37,"cve_count":38,"kev_count":16,"has_kev":17},"5.37",3,"Usg20-vpn Firmware by Zyxel is a technology product with 10 tracked versions and 15 known security vulnerabilities including 4 CISA Known Exploited Vulnerabilities. Get comprehensive security analysis, vulnerability tracking, and threat intelligence for this product.",[41,42,43,44,45,46,47,48,49,50],{"version":15,"cve_count":16,"kev_count":16,"has_kev":17},{"version":19,"cve_count":16,"kev_count":16,"has_kev":17},{"version":21,"cve_count":22,"kev_count":16,"has_kev":17},{"version":24,"cve_count":16,"kev_count":16,"has_kev":17},{"version":26,"cve_count":16,"kev_count":16,"has_kev":17},{"version":28,"cve_count":22,"kev_count":22,"has_kev":4},{"version":30,"cve_count":16,"kev_count":16,"has_kev":17},{"version":32,"cve_count":16,"kev_count":16,"has_kev":17},{"version":34,"cve_count":35,"kev_count":35,"has_kev":4},{"version":37,"cve_count":38,"kev_count":16,"has_kev":17},[52,60,65,70,74,82,89,94,100,106],{"cveId":53,"description":54,"publishedDate":55,"cvssScore":56,"cvssVersion":57,"severity":58,"isKev":4,"epssScore":59},"CVE-2020-9054","Multiple ZyXEL network-attached storage (NAS) devices running firmware version 5.21 contain a pre-authentication command injection vulnerability, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable device. ZyXEL NAS devices achieve authentication by using the weblogin.cgi CGI executable. This program fails to properly sanitize the username parameter that is passed to it. If the username parameter contains certain characters, it can allow command injection with the privileges of the web server that runs on the ZyXEL device. Although the web server does not run as the root user, ZyXEL devices include a setuid utility that can be leveraged to run any command with root privileges. As such, it should be assumed that exploitation of this vulnerability can lead to remote code execution with root privileges. By sending a specially-crafted HTTP POST or GET request to a vulnerable ZyXEL device, a remote, unauthenticated attacker may be able to execute arbitrary code on the device. This may happen by directly connecting to a device if it is directly exposed to an attacker. However, there are ways to trigger such crafted requests even if an attacker does not have direct connectivity to a vulnerable devices. For example, simply visiting a website can result in the compromise of any ZyXEL device that is reachable from the client system. Affected products include: NAS326 before firmware V5.21(AAZF.7)C0 NAS520 before firmware V5.21(AASZ.3)C0 NAS540 before firmware V5.21(AATB.4)C0 NAS542 before firmware V5.21(ABAG.4)C0 ZyXEL has made firmware updates available for NAS326, NAS520, NAS540, and NAS542 devices. Affected models that are end-of-support: NSA210, NSA220, NSA220+, NSA221, NSA310, NSA310S, NSA320, NSA320S, NSA325 and NSA325v2","2020-03-04",9.8,"v3.1","Critical",0.99988,{"cveId":61,"description":62,"publishedDate":63,"cvssScore":56,"cvssVersion":57,"severity":58,"isKev":4,"epssScore":64},"CVE-2020-29583","Firmware version 4.60 of Zyxel USG devices contains an undocumented account (zyfwp) with an unchangeable password. The password for this account can be found in cleartext in the firmware. This account can be used by someone to login to the ssh server or web interface with admin privileges.","2020-12-22",0.90155,{"cveId":66,"description":67,"publishedDate":68,"cvssScore":56,"cvssVersion":57,"severity":58,"isKev":4,"epssScore":69},"CVE-2023-33010","A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX series firmware versions 4.50 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.25 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.25 through 5.36 Patch 1, VPN series firmware versions 4.30 through 5.36 Patch 1, ZyWALL\u002FUSG series firmware versions 4.25 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.","2023-05-24",0.29024,{"cveId":71,"description":72,"publishedDate":68,"cvssScore":56,"cvssVersion":57,"severity":58,"isKev":4,"epssScore":73},"CVE-2023-33009","A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX series firmware versions 4.60 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.60 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.60 through 5.36 Patch 1, VPN series firmware versions 4.60 through 5.36 Patch 1, ZyWALL\u002FUSG series firmware versions 4.60 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.\n\n",0.28144,{"cveId":75,"description":76,"publishedDate":77,"cvssScore":78,"cvssVersion":79,"severity":80,"isKev":17,"epssScore":81},"CVE-2019-9955","On Zyxel ATP200, ATP500, ATP800, USG20-VPN, USG20W-VPN, USG40, USG40W, USG60, USG60W, USG110, USG210, USG310, USG1100, USG1900, USG2200-VPN, ZyWALL 110, ZyWALL 310, ZyWALL 1100 devices, the security firewall login page is vulnerable to Reflected XSS via the unsanitized 'mp_idx' parameter.","2019-04-22",6.1,"v3.0","Medium",0.2118,{"cveId":83,"description":84,"publishedDate":85,"cvssScore":86,"cvssVersion":57,"severity":87,"isKev":17,"epssScore":88},"CVE-2022-38547","A post-authentication command injection vulnerability in the CLI command of Zyxel ZyWALL\u002FUSG series firmware versions 4.20 through 4.72, VPN series firmware versions 4.30 through 5.32, USG FLEX series firmware versions 4.50 through 5.32, and ATP series firmware versions 4.32 through 5.32, which could allow an authenticated attacker with administrator privileges to execute OS commands.","2023-02-07",7.2,"High",0.02829,{"cveId":90,"description":91,"publishedDate":92,"cvssScore":56,"cvssVersion":57,"severity":58,"isKev":17,"epssScore":93},"CVE-2021-35029","An authentication bypasss vulnerability in the web-based management interface of Zyxel USG\u002FZywall series firmware versions 4.35 through 4.64 and USG Flex, ATP, and VPN series firmware versions 4.35 through 5.01, which could allow a remote attacker to execute arbitrary commands on an affected device.","2021-07-02",0.02255,{"cveId":95,"description":96,"publishedDate":97,"cvssScore":98,"cvssVersion":57,"severity":87,"isKev":17,"epssScore":99},"CVE-2023-27991","The post-authentication command injection vulnerability in the CLI command 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, and VPN series firmware versions 4.30 through 5.35, which could allow an authenticated attacker to execute some OS commands remotely.","2023-04-24",8.8,0.01453,{"cveId":101,"description":102,"publishedDate":103,"cvssScore":104,"cvssVersion":57,"severity":80,"isKev":17,"epssScore":105},"CVE-2022-2030","A directory traversal vulnerability caused by specific character sequences within an improperly sanitized URL was identified in some CGI programs of Zyxel USG FLEX 100(W) firmware versions 4.50 through 5.30, USG FLEX 200 firmware versions 4.50 through 5.30, USG FLEX 500 firmware versions 4.50 through 5.30, USG FLEX 700 firmware versions 4.50 through 5.30, USG FLEX 50(W) firmware versions 4.16 through 5.30, USG20(W)-VPN firmware versions 4.16 through 5.30, ATP series firmware versions 4.32 through 5.30, VPN series firmware versions 4.30 through 5.30, USG\u002FZyWALL series firmware versions 4.11 through 4.72, that could allow an authenticated attacker to access some restricted files on a vulnerable device.","2022-07-19",6.5,0.01354,{"cveId":107,"description":108,"publishedDate":12,"cvssScore":86,"cvssVersion":57,"severity":87,"isKev":17,"epssScore":109},"CVE-2023-6398","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, \n\nUSG FLEX H series firmware versions from 1.10 through 1.10 Patch 1,\n\nNWA50AX 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.",0.01333,[111,116,118,122],{"cveId":71,"description":72,"publishedDate":68,"cvssScore":56,"severity":58,"isKev":4,"epssScore":73,"cisaVulnName":112,"cisaDateAdded":113,"cisaShortDescription":114,"cisaRequiredAction":115},"Zyxel Multiple Firewalls Buffer Overflow Vulnerability","2023-06-05","Zyxel ATP, USG FLEX, USG FLEX 50(W), USG20(W)-VPN, VPN, and ZyWALL\u002FUSG firewalls contain a buffer overflow vulnerability in the notification function that could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and remote code execution on an affected device.","Apply updates per vendor instructions.",{"cveId":66,"description":67,"publishedDate":68,"cvssScore":56,"severity":58,"isKev":4,"epssScore":69,"cisaVulnName":112,"cisaDateAdded":113,"cisaShortDescription":117,"cisaRequiredAction":115},"Zyxel ATP, USG FLEX, USG FLEX 50(W), USG20(W)-VPN, VPN, and ZyWALL\u002FUSG firewalls contain a buffer overflow vulnerability in the ID processing function that could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and remote code execution on an affected device.",{"cveId":53,"description":54,"publishedDate":55,"cvssScore":56,"severity":58,"isKev":4,"epssScore":59,"cisaVulnName":119,"cisaDateAdded":120,"cisaShortDescription":121,"cisaRequiredAction":115},"Zyxel Multiple NAS Devices OS Command Injection Vulnerability","2022-03-25","Multiple Zyxel network-attached storage (NAS) devices contain a pre-authentication command injection vulnerability, which may allow a remote, unauthenticated attacker to execute arbitrary code.",{"cveId":61,"description":62,"publishedDate":63,"cvssScore":56,"severity":58,"isKev":4,"epssScore":64,"cisaVulnName":123,"cisaDateAdded":124,"cisaShortDescription":125,"cisaRequiredAction":115},"Zyxel Multiple Products Use of Hard-Coded Credentials Vulnerability","2021-11-03","Zyxel firewalls (ATP, USG, VM) and AP Controllers (NXC2500 and NXC5500) contain a use of hard-coded credentials vulnerability in an undocumented account (\"zyfwp\") with an unchangeable password.",{"title":127,"metaDescription":128,"keywords":129,"structuredData":130},"Usg20-vpn Firmware by Zyxel - Security Vulnerabilities & Analysis | Precursor Intelligence","Comprehensive security analysis for Usg20-vpn Firmware by Zyxel covering 10 versions with 15 tracked vulnerabilities including 4 critical and 0 high-severity issues and 4 CISA KEV vulnerabilities. Real-time threat intelligence, CVE tracking, and security recommendations.","Usg20-vpn Firmware vulnerabilities, Usg20-vpn Firmware security, Usg20-vpn Firmware CVE, Zyxel Usg20-vpn Firmware, Usg20-vpn Firmware threat intelligence, Zyxel security, product security analysis, cybersecurity threats, vulnerability management, CVE tracking, Usg20-vpn Firmware KEV, Usg20-vpn Firmware exploited vulnerabilities",{"@context":131,"@type":132,"name":133,"description":128,"url":134,"manufacturer":135,"applicationCategory":139,"softwareVersion":140,"mainEntity":141},"https:\u002F\u002Fschema.org","SoftwareApplication","Usg20-vpn Firmware","https:\u002F\u002Fprecursorintelligence.com\u002Fvulnerabilities\u002Ftechnologies\u002Fvendors\u002Fzyxel\u002Fusg20-vpn_firmware",{"@type":136,"name":137,"url":138},"Organization","Zyxel","https:\u002F\u002Fprecursorintelligence.com\u002Fvendors\u002Fzyxel","Security Software","10 versions tracked",{"@type":142,"name":143,"description":144,"vulnerabilityCount":10,"dateModified":12},"SecurityVulnerability","Usg20-vpn Firmware Security Vulnerabilities","Security vulnerabilities affecting Usg20-vpn Firmware by Zyxel",{"totalVersions":9,"totalVulnerabilities":10,"kevVulnerabilities":11,"lastUpdated":12,"generatedAt":146,"apiVersion":147},"2026-10-18T20:57:59.204Z","3.0",[],{"rows":150,"total":11,"capped":17,"failed":16},[151,157,162,167],{"cveId":71,"name":112,"severity":58,"cvss":56,"added":113,"epss":73,"published":152,"ranges":153,"checked":4,"hits":156,"covers":17},"2023-05-24T13:15:09.56",[154,34,155],"4.60 to before 5.36","5.36-patch1",[],{"cveId":66,"name":112,"severity":58,"cvss":56,"added":113,"epss":69,"published":158,"ranges":159,"checked":4,"hits":161,"covers":17},"2023-05-24T13:15:09.64",[160,34,155],"4.30 to before 5.36",[],{"cveId":53,"name":119,"severity":58,"cvss":56,"added":120,"epss":59,"published":163,"ranges":164,"checked":4,"hits":166,"covers":17},"2020-03-04T20:15:10.75",[165],"4.35 to before 4.35(abaq.3)c0",[],{"cveId":61,"name":123,"severity":58,"cvss":56,"added":124,"epss":64,"published":168,"ranges":169,"checked":4,"hits":170,"covers":17},"2020-12-22T22:15:14.443",[28],[]]