Filtered by vendor Zyxel
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Total
304 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2022-30525 | 1 Zyxel | 32 Atp100, Atp100 Firmware, Atp100w and 29 more | 2025-10-22 | 10.0 HIGH | 9.8 CRITICAL |
| A OS command injection vulnerability in the CGI program of Zyxel USG FLEX 100(W) firmware versions 5.00 through 5.21 Patch 1, USG FLEX 200 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 500 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 700 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 50(W) firmware versions 5.10 through 5.21 Patch 1, USG20(W)-VPN firmware versions 5.10 through 5.21 Patch 1, ATP series firmware versions 5.10 through 5.21 Patch 1, VPN series firmware versions 4.60 through 5.21 Patch 1, which could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device. | |||||
| CVE-2020-9054 | 1 Zyxel | 54 Atp100, Atp100 Firmware, Atp200 and 51 more | 2025-10-22 | 10.0 HIGH | 9.8 CRITICAL |
| 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 | |||||
| CVE-2020-29583 | 1 Zyxel | 60 Atp100, Atp100 Firmware, Atp100w and 57 more | 2025-10-22 | 10.0 HIGH | 9.8 CRITICAL |
| 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. | |||||
| CVE-2017-6884 | 1 Zyxel | 2 Emg2926, Emg2926 Firmware | 2025-10-22 | 9.0 HIGH | 8.8 HIGH |
| A command injection vulnerability was discovered on the Zyxel EMG2926 home router with firmware V1.00(AAQT.4)b8. The vulnerability is located in the diagnostic tools, specifically the nslookup function. A malicious user may exploit numerous vectors to execute arbitrary commands on the router, such as the ping_ip parameter to the expert/maintenance/diagnostic/nslookup URI. | |||||
| CVE-2017-18368 | 2 Billion, Zyxel | 6 5200w-t, 5200w-t Firmware, P660hn-t1a V1 and 3 more | 2025-10-22 | 10.0 HIGH | 9.8 CRITICAL |
| The ZyXEL P660HN-T1A v1 TCLinux Fw $7.3.15.0 v001 / 3.40(ULM.0)b31 router distributed by TrueOnline has a command injection vulnerability in the Remote System Log forwarding function, which is accessible by an unauthenticated user. The vulnerability is in the ViewLog.asp page and can be exploited through the remote_host parameter. | |||||
| CVE-2024-40891 | 1 Zyxel | 27 Sbg3300-n000, Sbg3300-n000 Firmware, Sbg3300-nb00 and 24 more | 2025-10-21 | N/A | 8.8 HIGH |
| **UNSUPPORTED WHEN ASSIGNED** A post-authentication command injection vulnerability in the management commands of the legacy DSL CPE Zyxel VMG4325-B10A firmware version 1.00(AAFR.4)C0_20170615 could allow an authenticated attacker to execute operating system (OS) commands on an affected device via Telnet. | |||||
| CVE-2024-40890 | 1 Zyxel | 27 Sbg3300-n000, Sbg3300-n000 Firmware, Sbg3300-nb00 and 24 more | 2025-10-21 | N/A | 8.8 HIGH |
| **UNSUPPORTED WHEN ASSIGNED** A post-authentication command injection vulnerability in the CGI program of the legacy DSL CPE Zyxel VMG4325-B10A firmware version 1.00(AAFR.4)C0_20170615 could allow an authenticated attacker to execute operating system (OS) commands on an affected device by sending a crafted HTTP POST request. | |||||
| CVE-2024-11667 | 1 Zyxel | 18 Atp, Atp100, Atp100w and 15 more | 2025-10-21 | N/A | 7.5 HIGH |
| A directory traversal vulnerability in the web management interface of Zyxel ATP series firmware versions V5.00 through V5.38, USG FLEX series firmware versions V5.00 through V5.38, USG FLEX 50(W) series firmware versions V5.10 through V5.38, and USG20(W)-VPN series firmware versions V5.10 through V5.38 could allow an attacker to download or upload files via a crafted URL. | |||||
| CVE-2023-33010 | 1 Zyxel | 46 Atp100, Atp100 Firmware, Atp100w and 43 more | 2025-10-21 | N/A | 9.8 CRITICAL |
| 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/USG 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. | |||||
| CVE-2023-33009 | 1 Zyxel | 46 Atp100, Atp100 Firmware, Atp100w and 43 more | 2025-10-21 | N/A | 9.8 CRITICAL |
| 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/USG 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. | |||||
| CVE-2023-28771 | 1 Zyxel | 38 Atp100, Atp100 Firmware, Atp100w and 35 more | 2025-10-21 | N/A | 9.8 CRITICAL |
| Improper error message handling in Zyxel ZyWALL/USG series firmware versions 4.60 through 4.73, VPN series firmware versions 4.60 through 5.35, USG FLEX series firmware versions 4.60 through 5.35, and ATP series firmware versions 4.60 through 5.35, which could allow an unauthenticated attacker to execute some OS commands remotely by sending crafted packets to an affected device. | |||||
| CVE-2023-27992 | 1 Zyxel | 6 Nas326, Nas326 Firmware, Nas540 and 3 more | 2025-10-21 | N/A | 9.8 CRITICAL |
| The pre-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.14)C0, NAS540 firmware versions prior to V5.21(AATB.11)C0, and NAS542 firmware versions prior to V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands remotely by sending a crafted HTTP request. | |||||
| CVE-2025-3577 | 1 Zyxel | 2 Amg1302-t10b, Amg1302-t10b Firmware | 2025-06-23 | N/A | 4.9 MEDIUM |
| **UNSUPPORTED WHEN ASSIGNED** A path traversal vulnerability in the web management interface of the Zyxel AMG1302-T10B firmware version 2.00(AAJC.16)C0 could allow an authenticated attacker with administrator privileges to access restricted directories by sending a crafted HTTP request to an affected device. | |||||
| CVE-2016-10227 | 1 Zyxel | 4 Nwa3560-n, Nwa3560-n Firmware, Usg50 and 1 more | 2025-04-20 | 7.8 HIGH | 7.5 HIGH |
| Zyxel USG50 Security Appliance and NWA3560-N Access Point allow remote attackers to cause a denial of service (CPU consumption) via a flood of ICMPv4 Port Unreachable packets. | |||||
| CVE-2015-7256 | 1 Zyxel | 50 C1000z, C1000z Firmware, Fr1000z and 47 more | 2025-04-20 | 4.3 MEDIUM | 5.9 MEDIUM |
| ZyXEL NWA1100-N, NWA1100-NH, NWA1121-NI, NWA1123-AC, and NWA1123-NI access points; P-660HN-51, P-663HN-51, VMG1312-B10A, VMG1312-B30A, VMG1312-B30B, VMG4380-B10A, VMG8324-B10A, VMG8924-B10A, VMG8924-B30A, and VSG1435-B101 DSL CPEs; PMG5318-B20A GPONs; SBG3300-N000, SBG3300-NB00, and SBG3500-N000 small business gateways; GS1900-8 and GS1900-24 switches; and C1000Z, Q1000, FR1000Z, and P8702N project models use non-unique X.509 certificates and SSH host keys. | |||||
| CVE-2016-10401 | 1 Zyxel | 2 Pk5001z, Pk5001z Firmware | 2025-04-20 | 9.0 HIGH | 8.8 HIGH |
| ZyXEL PK5001Z devices have zyad5001 as the su password, which makes it easier for remote attackers to obtain root access if a non-root account password is known (or a non-root default account exists within an ISP's deployment of these devices). | |||||
| CVE-2017-3216 | 5 Greenpacket, Huawei, Mada and 2 more | 28 Ox350, Ox350 Firmware, Bm2022 and 25 more | 2025-04-20 | 10.0 HIGH | 9.8 CRITICAL |
| WiMAX routers based on the MediaTek SDK (libmtk) that use a custom httpd plugin are vulnerable to an authentication bypass allowing a remote, unauthenticated attacker to gain administrator access to the device by performing an administrator password change on the device via a crafted POST request. | |||||
| CVE-2017-7964 | 1 Zyxel | 1 Wre6505 Firmware | 2025-04-20 | 10.0 HIGH | 10.0 CRITICAL |
| Zyxel WRE6505 devices have a default TELNET password of 1234 for the root and admin accounts, which makes it easier for remote attackers to conduct DNS hijacking attacks by reconfiguring the built-in dnshijacker process. | |||||
| CVE-2017-15226 | 1 Zyxel | 2 Nbg6716, Nbg6716 Firmware | 2025-04-20 | 7.5 HIGH | 9.8 CRITICAL |
| Zyxel NBG6716 V1.00(AAKG.9)C0 devices allow command injection in the ozkerz component because beginIndex and endIndex are used directly in a popen call. | |||||
| CVE-2017-17901 | 1 Zyxel | 2 P-660hw, P-660hw Firmware | 2025-04-20 | 7.8 HIGH | 7.5 HIGH |
| ZyXEL P-660HW v3 devices allow remote attackers to cause a denial of service (CPU consumption) via a flood of IP packets with a TTL of 1. | |||||