Vulnerabilities (CVE)

Filtered by vendor Zyxel Subscribe
Total 280 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2020-13365 1 Zyxel 8 Nas326, Nas326 Firmware, Nas520 and 5 more 2024-11-21 9.0 HIGH 8.8 HIGH
Certain Zyxel products have a locally accessible binary that allows a non-root user to generate a password for an undocumented user account that can be used for a TELNET session as root. This affects NAS520 V5.21(AASZ.4)C0, V5.21(AASZ.0)C0, V5.11(AASZ.3)C0, and V5.11(AASZ.0)C0; NAS542 V5.11(ABAG.0)C0, V5.20(ABAG.1)C0, and V5.21(ABAG.3)C0; NSA325 v2_V4.81(AALS.0)C0 and V4.81(AAAJ.1)C0; NSA310 4.22(AFK.0)C0 and 4.22(AFK.1)C0; NAS326 V5.21(AAZF.8)C0, V5.11(AAZF.4)C0, V5.11(AAZF.2)C0, and V5.11(AAZF.3)C0; NSA310S V4.75(AALH.2)C0; NSA320S V4.75(AANV.2)C0 and V4.75(AANV.1)C0; NSA221 V4.41(AFM.1)C0; and NAS540 V5.21(AATB.5)C0 and V5.21(AATB.3)C0.
CVE-2020-13364 1 Zyxel 8 Nas326, Nas326 Firmware, Nas520 and 5 more 2024-11-21 9.0 HIGH 8.8 HIGH
A backdoor in certain Zyxel products allows remote TELNET access via a CGI script. This affects NAS520 V5.21(AASZ.4)C0, V5.21(AASZ.0)C0, V5.11(AASZ.3)C0, and V5.11(AASZ.0)C0; NAS542 V5.11(ABAG.0)C0, V5.20(ABAG.1)C0, and V5.21(ABAG.3)C0; NSA325 v2_V4.81(AALS.0)C0 and V4.81(AAAJ.1)C0; NSA310 4.22(AFK.0)C0 and 4.22(AFK.1)C0; NAS326 V5.21(AAZF.8)C0, V5.11(AAZF.4)C0, V5.11(AAZF.2)C0, and V5.11(AAZF.3)C0; NSA310S V4.75(AALH.2)C0; NSA320S V4.75(AANV.2)C0 and V4.75(AANV.1)C0; NSA221 V4.41(AFM.1)C0; and NAS540 V5.21(AATB.5)C0 and V5.21(AATB.3)C0.
CVE-2020-12695 21 Asus, Broadcom, Canon and 18 more 217 Rt-n11, Adsl, Selphy Cp1200 and 214 more 2024-11-21 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-2019-9955 1 Zyxel 42 Atp200, Atp200 Firmware, Atp500 and 39 more 2024-11-21 4.3 MEDIUM 6.1 MEDIUM
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.
CVE-2019-7391 1 Zyxel 4 Dsl-491hnu-b10b, Dsl-491hnu-b10b Firmware, Dsl-491hnu-b1b V2 and 1 more 2024-11-21 6.8 MEDIUM 8.8 HIGH
ZyXEL VMG3312-B10B DSL-491HNU-B1B v2 devices allow login/login-page.cgi CSRF.
CVE-2019-6725 1 Zyxel 2 P-660hn-t1, P-660hn-t1 Firmware 2024-11-21 10.0 HIGH 9.8 CRITICAL
The rpWLANRedirect.asp ASP page is accessible without authentication on ZyXEL P-660HN-T1 V2 (2.00(AAKK.3)) devices. After accessing the page, the admin user's password can be obtained by viewing the HTML source code, and the interface of the modem can be accessed as admin.
CVE-2019-6710 1 Zyxel 2 Nbg-418n, Nbg-418n Firmware 2024-11-21 6.8 MEDIUM 8.8 HIGH
Zyxel NBG-418N v2 v1.00(AAXM.4)C0 devices allow login.cgi CSRF.
CVE-2019-17354 1 Zyxel 2 Nbg-418n V2, Nbg-418n V2 Firmware 2024-11-21 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-2019-15815 1 Zyxel 2 2.00\(abbx.3\), P-1302-t10d 2024-11-21 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 2024-11-21 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-2019-15803 1 Zyxel 18 Gs1900-10hp, Gs1900-10hp Firmware, Gs1900-16 and 15 more 2024-11-21 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-2019-15802 1 Zyxel 18 Gs1900-10hp, Gs1900-10hp Firmware, Gs1900-16 and 15 more 2024-11-21 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-2019-15801 1 Zyxel 18 Gs1900-10hp, Gs1900-10hp Firmware, Gs1900-16 and 15 more 2024-11-21 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-2019-15800 1 Zyxel 18 Gs1900-10hp, Gs1900-10hp Firmware, Gs1900-16 and 15 more 2024-11-21 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-2019-15799 1 Zyxel 18 Gs1900-10hp, Gs1900-10hp Firmware, Gs1900-16 and 15 more 2024-11-21 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-2019-13495 1 Zyxel 2 Xgs2210-52hp, Xgs2210-52hp Firmware 2024-11-21 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-2019-12583 1 Zyxel 28 Uag2100, Uag2100 Firmware, Uag4100 and 25 more 2024-11-21 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-2019-12581 1 Zyxel 18 Uag2100, Uag2100 Firmware, Uag4100 and 15 more 2024-11-21 4.3 MEDIUM 6.1 MEDIUM
A reflective Cross-site scripting (XSS) vulnerability in the free_time_failed.cgi CGI program in selected Zyxel ZyWall, USG, and UAG devices allows remote attackers to inject arbitrary web script or HTML via the err_msg parameter.
CVE-2019-10634 1 Zyxel 2 Nas326, Nas326 Firmware 2024-11-21 3.5 LOW 5.4 MEDIUM
An XSS vulnerability in the Zyxel NAS 326 version 5.21 and below allows a remote authenticated attacker to inject arbitrary JavaScript or HTML via the user, group, and file-share description fields.
CVE-2019-10633 1 Zyxel 2 Nas326, Nas326 Firmware 2024-11-21 6.5 MEDIUM 8.8 HIGH
An eval injection vulnerability in the Python web server routing on the Zyxel NAS 326 version 5.21 and below allows a remote authenticated attacker to execute arbitrary code via the tjp6jp6y4, simZysh, and ck6fup6 APIs.