Vulnerabilities (CVE)

Filtered by vendor Zyxel Subscribe
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2021-35028 1 Zyxel 2 Zywall Vpn2s, Zywall Vpn2s Firmware 2021-10-02 7.2 HIGH 7.8 HIGH
A command injection vulnerability in the CGI program of the Zyxel VPN2S firmware version 1.12 could allow an authenticated, local user to execute arbitrary OS commands.
CVE-2021-35027 1 Zyxel 2 Zywall Vpn2s, Zywall Vpn2s Firmware 2021-10-02 5.0 MEDIUM 7.5 HIGH
A directory traversal vulnerability in the web server of the Zyxel VPN2S firmware version 1.12 could allow a remote attacker to gain access to sensitive information.
CVE-2021-35030 1 Zyxel 24 Gs1900-10hp, Gs1900-10hp Firmware, Gs1900-16 and 21 more 2021-08-13 2.3 LOW 4.3 MEDIUM
A vulnerability was found in the CGI program in Zyxel GS1900-8 firmware version V2.60, that did not properly sterilize packet contents and could allow an authenticated, local user to perform a cross-site scripting (XSS) attack via a crafted LLDP packet.
CVE-2019-15801 1 Zyxel 18 Gs1900-10hp, Gs1900-10hp Firmware, Gs1900-16 and 15 more 2021-07-21 5.0 MEDIUM 7.5 HIGH
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. The firmware image contains encrypted passwords that are used to authenticate users wishing to access a diagnostics or password-recovery menu. Using the hardcoded cryptographic key found elsewhere in the firmware, these passwords can be decrypted. This is related to fds_sys_passDebugPasswd_ret() and fds_sys_passRecoveryPasswd_ret() in libfds.so.0.0.
CVE-2020-20183 1 Zyxel 2 P1302-t10 V3, P1302-t10 V3 Firmware 2021-07-21 5.0 MEDIUM 7.5 HIGH
Insecure direct object reference vulnerability in Zyxel’s P1302-T10 v3 with firmware version 2.00(ABBX.3) and earlier allows attackers to gain privileges and access certain admin pages.
CVE-2020-24354 1 Zyxel 2 Vmg5313-b30b, Vmg5313-b30b Firmware 2021-07-21 6.5 MEDIUM 8.8 HIGH
Zyxel VMG5313-B30B router on firmware 5.13(ABCJ.6)b3_1127, and possibly older versions of firmware are affected by shell injection.
CVE-2020-15348 1 Zyxel 1 Cloud Cnm Secumanager 2021-07-21 10.0 HIGH 9.8 CRITICAL
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 allows use of live/CPEManager/AXCampaignManager/delete_cpes_by_ids?cpe_ids= for eval injection of Python code.
CVE-2021-35029 1 Zyxel 74 Usg100, Usg1000, Usg1000 Firmware and 71 more 2021-07-08 7.5 HIGH 9.8 CRITICAL
An authentication bypasss vulnerability in the web-based management interface of Zyxel USG/Zywall 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.
CVE-2020-12695 18 Asus, Broadcom, Canon and 15 more 257 Rt-n11, Adsl, Selphy Cp1200 and 254 more 2021-04-23 7.8 HIGH 7.5 HIGH
The Open Connectivity Foundation UPnP specification before 2020-04-17 does not forbid the acceptance of a subscription request with a delivery URL on a different network segment than the fully qualified event-subscription URL, aka the CallStranger issue.
CVE-2020-28899 1 Zyxel 6 Lte4506-m606, Lte4506-m606 Firmware, Lte7460-m608 and 3 more 2021-03-22 6.4 MEDIUM 9.1 CRITICAL
The Web CGI Script on ZyXEL LTE4506-M606 V1.00(ABDO.2)C0 devices does not require authentication, which allows remote unauthenticated attackers (via crafted JSON action data to /cgi-bin/gui.cgi) to use all features provided by the router. Examples: change the router password, retrieve the Wi-Fi passphrase, send an SMS message, or modify the IP forwarding to access the internal network.
CVE-2021-3297 1 Zyxel 2 Nbg2105, Nbg2105 Firmware 2021-02-03 7.2 HIGH 7.8 HIGH
On Zyxel NBG2105 V1.00(AAGU.2)C0 devices, setting the login cookie to 1 provides administrator access.
CVE-2020-29299 1 Zyxel 7 Atp, Nsg, Nsg Firmware and 4 more 2021-01-05 9.0 HIGH 7.2 HIGH
Certain Zyxel products allow command injection by an admin via an input string to chg_exp_pwd during a password-change action. This affects VPN On-premise before ZLD V4.39 week38, VPN Orchestrator before SD-OS V10.03 week32, USG before ZLD V4.39 week38, USG FLEX before ZLD V4.55 week38, ATP before ZLD V4.55 week38, and NSG before 1.33 patch 4.
CVE-2020-25014 1 Zyxel 52 Access Points Firmware, Nwa110ax, Nwa1123-ac Hd and 49 more 2020-12-10 7.5 HIGH 9.8 CRITICAL
A stack-based buffer overflow in fbwifi_continue.cgi on Zyxel UTM and VPN series of gateways running firmware version V4.30 through to V4.55 allows remote unauthenticated attackers to execute arbitrary code via a crafted http packet.
CVE-2020-24355 1 Zyxel 2 Vmg5313-b30b, Vmg5313-b30b Firmware 2020-09-11 10.0 HIGH 9.8 CRITICAL
Zyxel VMG5313-B30B router on firmware 5.13(ABCJ.6)b3_1127, and possibly older versions of firmware are affected by insecure permissions which allows regular and other users to create new users with elevated privileges. This is done by changing "FirstIndex" field in JSON that is POST-ed during account creation. Similar may also be possible with account deletion.
CVE-2019-15803 1 Zyxel 18 Gs1900-10hp, Gs1900-10hp Firmware, Gs1900-16 and 15 more 2020-08-24 6.4 MEDIUM 9.1 CRITICAL
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Through an undocumented sequence of keypresses, undocumented functionality is triggered. A diagnostics shell is triggered via CTRL-ALT-t, which prompts for the password returned by fds_sys_passDebugPasswd_ret(). The firmware contains access control checks that determine if remote users are allowed to access this functionality. The function that performs this check (fds_sys_remoteDebugEnable_ret in libfds.so) always return TRUE with no actual checks performed. The diagnostics menu allows for reading/writing arbitrary registers and various other configuration parameters which are believed to be related to the network interface chips.
CVE-2018-14893 1 Zyxel 2 Nsa325 V2, Nsa325 V2 Firmware 2020-08-24 9.0 HIGH 8.8 HIGH
A system command injection vulnerability in zyshclient in ZyXEL NSA325 V2 version 4.81 allows attackers to execute system commands via the web application API.
CVE-2019-12583 1 Zyxel 28 Uag2100, Uag2100 Firmware, Uag4100 and 25 more 2020-08-24 6.4 MEDIUM 9.1 CRITICAL
Missing Access Control in the "Free Time" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator. This can lead to unauthorised network access or Denial of Service.
CVE-2019-15800 1 Zyxel 18 Gs1900-10hp, Gs1900-10hp Firmware, Gs1900-16 and 15 more 2020-08-24 10.0 HIGH 9.8 CRITICAL
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Due to lack of input validation in the cmd_sys_traceroute_exec(), cmd_sys_arp_clear(), and cmd_sys_ping_exec() functions in the libclicmd.so library contained in the firmware, an attacker could leverage these functions to call system() and execute arbitrary commands on the switches. (Note that these functions are currently not called in this version of the firmware, however an attacker could use other vulnerabilities to finally use these vulnerabilities to gain code execution.)
CVE-2019-17354 1 Zyxel 2 Nbg-418n V2, Nbg-418n V2 Firmware 2020-08-24 7.5 HIGH 9.4 CRITICAL
wan.htm page on Zyxel NBG-418N v2 with firmware version V1.00(AARP.9)C0 can be accessed directly without authentication, which can lead to disclosure of information about the WAN, and can also be leveraged by an attacker to modify data fields of the page.
CVE-2019-10630 1 Zyxel 2 Nas326, Nas326 Firmware 2020-08-24 4.0 MEDIUM 8.8 HIGH
A plaintext password vulnerability in the Zyxel NAS 326 through 5.21 allows an elevated privileged user to get the admin password of the device.
CVE-2019-10631 1 Zyxel 2 Nas326, Nas326 Firmware 2020-08-24 6.5 MEDIUM 8.8 HIGH
Shell Metacharacter Injection in the package installer on Zyxel NAS 326 version 5.21 and below allows an authenticated attacker to execute arbitrary code via multiple different requests.
CVE-2019-15815 1 Zyxel 2 2.00\(abbx.3\), P-1302-t10d 2020-08-24 4.0 MEDIUM 6.5 MEDIUM
ZyXEL P-1302-T10D v3 devices with firmware version 2.00(ABBX.3) and earlier do not properly enforce access control and could allow an unauthorized user to access certain pages that require admin privileges.
CVE-2019-15804 1 Zyxel 18 Gs1900-10hp, Gs1900-10hp Firmware, Gs1900-16 and 15 more 2020-08-24 5.0 MEDIUM 7.5 HIGH
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. By sending a signal to the CLI process, undocumented functionality is triggered. Specifically, a menu can be triggered by sending the SIGQUIT signal to the CLI application (e.g., through CTRL+\ via SSH). The access control check for this menu does work and prohibits accessing the menu, which contains "Password recovery for specific user" options. The menu is believed to be accessible using a serial console.
CVE-2020-14461 1 Zyxel 2 Wap6806, Wap6806 Firmware 2020-07-15 5.0 MEDIUM 8.6 HIGH
Zyxel Armor X1 WAP6806 1.00(ABAL.6)C0 devices allow Directory Traversal via the images/eaZy/ URI.
CVE-2020-15323 1 Zyxel 1 Cloudcnm Secumanager 2020-07-06 7.5 HIGH 9.8 CRITICAL
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has the cloud1234 password for the a1@chopin account default credentials.
CVE-2020-15322 1 Zyxel 1 Cloudcnm Secumanager 2020-07-06 7.5 HIGH 9.8 CRITICAL
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has the wbboEZ4BN3ssxAfM hardcoded password for the debian-sys-maint account.
CVE-2020-15318 1 Zyxel 1 Cloudcnm Secumanager 2020-07-06 4.3 MEDIUM 5.9 MEDIUM
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a hardcoded DSA SSH key for the root account within the /opt/mysql chroot directory tree.
CVE-2020-15321 1 Zyxel 1 Cloudcnm Secumanager 2020-07-06 7.5 HIGH 9.8 CRITICAL
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has the axzyxel password for the livedbuser account.
CVE-2020-15317 1 Zyxel 1 Cloudcnm Secumanager 2020-07-06 4.3 MEDIUM 5.9 MEDIUM
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a hardcoded RSA SSH key for the root account within the /opt/axess chroot directory tree.
CVE-2020-15316 1 Zyxel 1 Cloudcnm Secumanager 2020-07-06 4.3 MEDIUM 5.9 MEDIUM
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a hardcoded ECDSA SSH key for the root account within the /opt/axess chroot directory tree.
CVE-2020-15315 1 Zyxel 1 Cloudcnm Secumanager 2020-07-06 4.3 MEDIUM 5.9 MEDIUM
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a hardcoded DSA SSH key for the root account within the /opt/axess chroot directory tree.
CVE-2020-15324 1 Zyxel 1 Cloud Cnm Secumanager 2020-07-06 7.5 HIGH 9.8 CRITICAL
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a world-readable axess/opt/axXMPPHandler/config/xmpp_config.py file that stores hardcoded credentials.
CVE-2020-15314 1 Zyxel 1 Cloudcnm Secumanager 2020-07-02 4.3 MEDIUM 5.9 MEDIUM
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a hardcoded RSA SSH key for the root account.
CVE-2020-15319 1 Zyxel 1 Cloudcnm Secumanager 2020-07-02 4.3 MEDIUM 5.9 MEDIUM
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a hardcoded RSA SSH key for the root account within the /opt/mysql chroot directory tree.
CVE-2020-15320 1 Zyxel 1 Cloudcnm Secumanager 2020-07-02 7.5 HIGH 9.8 CRITICAL
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has the axiros password for the root account.
CVE-2020-15313 1 Zyxel 1 Cloudcnm Secumanager 2020-07-02 4.3 MEDIUM 5.9 MEDIUM
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a hardcoded ECDSA SSH key for the root account.
CVE-2020-15312 1 Zyxel 1 Cloudcnm Secumanager 2020-07-02 4.3 MEDIUM 5.9 MEDIUM
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a hardcoded DSA SSH key for the root account.
CVE-2019-13495 1 Zyxel 2 Xgs2210-52hp, Xgs2210-52hp Firmware 2020-04-01 3.5 LOW 5.4 MEDIUM
In firmware version 4.50 of Zyxel XGS2210-52HP, multiple stored cross-site scripting (XSS) issues allows remote authenticated users to inject arbitrary web script via an rpSys.html Name or Location field.
CVE-2020-9054 1 Zyxel 54 Atp100, Atp100 Firmware, Atp200 and 51 more 2020-03-06 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-2019-15802 1 Zyxel 18 Gs1900-10hp, Gs1900-10hp Firmware, Gs1900-16 and 15 more 2019-11-22 4.3 MEDIUM 5.9 MEDIUM
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. The firmware hashes and encrypts passwords using a hardcoded cryptographic key in sal_util_str_encrypt() in libsal.so.0.0. The parameters (salt, IV, and key data) are used to encrypt and decrypt all passwords using AES256 in CBC mode. With the parameters known, all previously encrypted passwords can be decrypted. This includes the passwords that are part of configuration backups or otherwise embedded as part of the firmware.
CVE-2019-15799 1 Zyxel 18 Gs1900-10hp, Gs1900-10hp Firmware, Gs1900-16 and 15 more 2019-11-21 9.0 HIGH 8.8 HIGH
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. User accounts created through the web interface of the device, when given non-admin level privileges, have the same level of privileged access as administrators when connecting to the device via SSH (while their permissions via the web interface are in fact restricted). This allows normal users to obtain the administrative password by running the tech-support command via the CLI: this contains the encrypted passwords for all users on the device. As these passwords are encrypted using well-known and static parameters, they can be decrypted and the original passwords (including the administrator password) can be obtained.
CVE-2018-1164 1 Zyxel 2 P-870h-51, P-870h-51 Firmware 2019-10-09 10.0 HIGH 9.8 CRITICAL
This vulnerability allows remote attackers to cause a denial-of-service condition on vulnerable installations of ZyXEL P-870H-51 DSL Router 1.00(AWG.3)D5. Authentication is not required to exploit this vulnerability. The specific flaw exists within numerous exposed CGI endpoints. The vulnerability is caused by improper access controls that allow access to critical functions without authentication. An attacker can use this vulnerability to reboot affected devices, along with other actions. Was ZDI-CAN-4540.
CVE-2017-3216 5 Greenpacket, Huawei, Mada and 2 more 28 Ox350, Ox350 Firmware, Bm2022 and 25 more 2019-10-09 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-2017-18372 2 Billion, Zyxel 6 5200w-t, 5200w-t Firmware, P660hn-t1a V1 and 3 more 2019-10-03 9.0 HIGH 8.8 HIGH
The Billion 5200W-T TCLinux Fw $7.3.8.0 v008 130603 router distributed by TrueOnline has a command injection vulnerability in the Time Setting function, which is only accessible by an authenticated user. The vulnerability is in the tools_time.asp page and can be exploited through the uiViewSNTPServer parameter. Authentication can be achieved by exploiting CVE-2017-18373.
CVE-2017-15226 1 Zyxel 2 Nbg6716, Nbg6716 Firmware 2019-10-03 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-2017-18370 2 Billion, Zyxel 6 5200w-t, 5200w-t Firmware, P660hn-t1a V1 and 3 more 2019-10-03 9.0 HIGH 8.8 HIGH
The ZyXEL P660HN-T1A v2 TCLinux Fw #7.3.37.6 router distributed by TrueOnline has a command injection vulnerability in the Remote System Log forwarding function, which is only accessible by an authenticated user. The vulnerability is in the logSet.asp page and can be exploited through the ServerIP parameter. Authentication can be achieved by exploiting CVE-2017-18371.
CVE-2017-18368 2 Billion, Zyxel 6 5200w-t, 5200w-t Firmware, P660hn-t1a V1 and 3 more 2019-10-03 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-2017-7964 1 Zyxel 1 Wre6505 Firmware 2019-10-03 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-2018-18754 1 Zyxel 2 Vmg3312-b10b, Vmg3312-b10b Firmware 2019-10-03 5.0 MEDIUM 9.8 CRITICAL
ZyXEL VMG3312-B10B 1.00(AAPP.7) devices have a backdoor root account with the tTn3+Z@!Sr0O+ password hash in the etc/default.cfg file.
CVE-2018-9129 1 Zyxel 34 Usg 110, Usg 1100, Usg 1100 Firmware and 31 more 2019-10-03 4.3 MEDIUM 5.9 MEDIUM
ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key Exchange (IKE) handshake implementation used for IPsec based VPN connections.