Vulnerability Description
A vulnerability in specific versions of Zyxel NBG6818, NBG7815, WSQ20, WSQ50, WSQ60, and WSR30 firmware with pre-configured password management could allow an attacker to obtain root access of the device, if the local attacker dismantles the device and uses a USB-to-UART cable to connect the device, or if the remote assistance feature had been enabled by an authenticated user.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | Nbg6818 Firmware | < 1.00\(absc.5\)c0 |
| Zyxel | Nbg6818 | - |
| Zyxel | Nbg7815 Firmware | < 1.00\(absk.7\)c0 |
| Zyxel | Nbg7815 | - |
| Zyxel | Wsq20 Firmware | < 1.00\(abof.11\)c0 |
| Zyxel | Wsq20 | - |
| Zyxel | Wsq50 Firmware | < 2.20\(abkj.7\)c0 |
| Zyxel | Wsq50 | - |
| Zyxel | Wsq60 Firmware | < 2.20\(abnd.8\)c0 |
| Zyxel | Wsq60 | - |
| Zyxel | Wsr30 Firmware | < 1.00\(abmy.12\)c0 |
| Zyxel | Wsr30 | - |
Related Weaknesses (CWE)
References
- https://www.tenable.com/security/research/tra-2022-06ExploitThird Party Advisory
- https://www.zyxel.com/support/Zyxel_security_advisory_for_pre-configured_passworVendor Advisory
- https://www.tenable.com/security/research/tra-2022-06ExploitThird Party Advisory
- https://www.zyxel.com/support/Zyxel_security_advisory_for_pre-configured_passworVendor Advisory
FAQ
What is CVE-2021-35033?
CVE-2021-35033 is a vulnerability with a CVSS score of 7.8 (HIGH). A vulnerability in specific versions of Zyxel NBG6818, NBG7815, WSQ20, WSQ50, WSQ60, and WSR30 firmware with pre-configured password management could allow an attacker to obtain root access of the dev...
How severe is CVE-2021-35033?
CVE-2021-35033 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-35033?
Check the references section above for vendor advisories and patch information. Affected products include: Zyxel Nbg6818 Firmware, Zyxel Nbg6818, Zyxel Nbg7815 Firmware, Zyxel Nbg7815, Zyxel Wsq20 Firmware.