CVE-2021-35033
Zyxel Network Gateway Root Access 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.
INFO
Published Date :
Nov. 23, 2021, 10:15 p.m.
Last Modified :
Nov. 21, 2024, 6:11 a.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2021-35033
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-35033.
| URL | Resource |
|---|---|
| https://www.tenable.com/security/research/tra-2022-06 | Exploit Third Party Advisory |
| https://www.zyxel.com/support/Zyxel_security_advisory_for_pre-configured_password_management_vulnerability_of_home_routers_and_WiFi_systems.shtml | Vendor Advisory |
| https://www.tenable.com/security/research/tra-2022-06 | Exploit Third Party Advisory |
| https://www.zyxel.com/support/Zyxel_security_advisory_for_pre-configured_password_management_vulnerability_of_home_routers_and_WiFi_systems.shtml | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-35033 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-35033
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-35033 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-35033 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://www.tenable.com/security/research/tra-2022-06 Added Reference https://www.zyxel.com/support/Zyxel_security_advisory_for_pre-configured_password_management_vulnerability_of_home_routers_and_WiFi_systems.shtml -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Oct. 27, 2022
Action Type Old Value New Value Removed CWE NIST CWE-522 Added CWE NIST CWE-287 -
Modified Analysis by [email protected]
Apr. 05, 2022
Action Type Old Value New Value Changed Reference Type https://www.tenable.com/security/research/tra-2022-06 No Types Assigned https://www.tenable.com/security/research/tra-2022-06 Exploit, Third Party Advisory -
CVE Modified by [email protected]
Feb. 28, 2022
Action Type Old Value New Value Added Reference https://www.tenable.com/security/research/tra-2022-06 [No Types Assigned] -
Initial Analysis by [email protected]
Dec. 01, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://www.zyxel.com/support/Zyxel_security_advisory_for_pre-configured_password_management_vulnerability_of_home_routers_and_WiFi_systems.shtml No Types Assigned https://www.zyxel.com/support/Zyxel_security_advisory_for_pre-configured_password_management_vulnerability_of_home_routers_and_WiFi_systems.shtml Vendor Advisory Added CWE NIST CWE-522 Added CPE Configuration AND OR *cpe:2.3:o:zyxel:nbg6818_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.00\(absc.5\)c0 OR cpe:2.3:h:zyxel:nbg6818:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:nbg7815_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.00\(absk.7\)c0 OR cpe:2.3:h:zyxel:nbg7815:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:wsq20_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.00\(abof.11\)c0 OR cpe:2.3:h:zyxel:wsq20:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:wsq50_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.20\(abkj.7\)c0 OR cpe:2.3:h:zyxel:wsq50:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:wsq60_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.20\(abnd.8\)c0 OR cpe:2.3:h:zyxel:wsq60:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:zyxel:wsr30_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.00\(abmy.12\)c0 OR cpe:2.3:h:zyxel:wsr30:-:*:*:*:*:*:*:*
Vulnerability Scoring Details
Base CVSS Score: 7.8
Base CVSS Score: 6.9
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} -0.08%
score
0.07021
percentile