Vulnerabilities (CVE)

Filtered by vendor Zyxel Subscribe
Total 316 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2023-33010 1 Zyxel 46 Atp100, Atp100 Firmware, Atp100w and 43 more 2025-10-27 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-2024-11667 1 Zyxel 18 Atp, Atp100, Atp100w and 15 more 2025-10-27 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-2024-40890 1 Zyxel 27 Sbg3300-n000, Sbg3300-n000 Firmware, Sbg3300-nb00 and 24 more 2025-10-27 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-2024-40891 1 Zyxel 27 Sbg3300-n000, Sbg3300-n000 Firmware, Sbg3300-nb00 and 24 more 2025-10-27 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-2022-30525 1 Zyxel 32 Atp100, Atp100 Firmware, Atp100w and 29 more 2025-10-27 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-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-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-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-2017-15226 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-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-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-2017-17901 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.
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-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-2015-6312 5 Cisco, Dell, Netgear and 2 more 9 Telepresence Server 7010, Telepresence Server Mse 8710, Telepresence Server On Multiparty Media 310 and 6 more 2025-04-12 7.8 HIGH 7.5 HIGH
Cisco TelePresence Server 3.1 on 7010, Mobility Services Engine (MSE) 8710, Multiparty Media 310 and 320, and Virtual Machine (VM) devices allows remote attackers to cause a denial of service (device reload) via malformed STUN packets, aka Bug ID CSCuv01348.
CVE-2015-0718 6 Cisco, Netgear, Samsung and 3 more 7 Nx-os, Unified Computing System, Jr6150 Firmware and 4 more 2025-04-12 7.8 HIGH 7.5 HIGH
Cisco NX-OS 4.0 through 6.1 on Nexus 1000V 3000, 4000, 5000, 6000, and 7000 devices and Unified Computing System (UCS) platforms allows remote attackers to cause a denial of service (TCP stack reload) by sending crafted TCP packets to a device that has a TIME_WAIT TCP session, aka Bug ID CSCub70579.
CVE-2014-0354 1 Zyxel 2 N300 Netusb Nbg-419n, N300 Netusb Nbg-419n Firmware 2025-04-12 7.8 HIGH N/A
The ZyXEL Wireless N300 NetUSB NBG-419N router with firmware 1.00(BFQ.6)C0 has a hardcoded password of qweasdzxc for an unspecified account, which allows remote attackers to obtain index.asp login access via an HTTP request.
CVE-2014-0353 1 Zyxel 2 N300 Netusb Nbg-419n, N300 Netusb Nbg-419n Firmware 2025-04-12 6.1 MEDIUM N/A
The ZyXEL Wireless N300 NetUSB NBG-419N router with firmware 1.00(BFQ.6)C0 allows remote attackers to bypass authentication by using %2F sequences in place of / (slash) characters.
CVE-2016-1348 6 Cisco, Netgear, Samsung and 3 more 6 Ios Xe, Jr6150 Firmware, X14j Firmware and 3 more 2025-04-12 7.8 HIGH 7.5 HIGH
Cisco IOS 15.0 through 15.5 and IOS XE 3.3 through 3.16 allow remote attackers to cause a denial of service (device reload) via a crafted DHCPv6 Relay message, aka Bug ID CSCus55821.
CVE-2015-5989 1 Zyxel 1 Gs1900-10hp Firmware 2025-04-12 10.0 HIGH 9.8 CRITICAL
Belkin F9K1102 2 devices with firmware 2.10.17 rely on client-side JavaScript code for authorization, which allows remote attackers to obtain administrative privileges via certain changes to LockStatus and Login_Success values.