CVE-2021-35033
CVSS V2 Medium 6.9
CVSS V3 High 7.8
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.
Overview
- CVE ID
- CVE-2021-35033
- Assigner
- security@zyxel.com.tw
- Vulnerability Status
- Analyzed
- Published Version
- 2021-11-23T22:15:07
- Last Modified Date
- 2022-10-27T16:59:30
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:zyxel:nbg6818_firmware:*:*:*:*:*:*:*:* | 1 | OR | 1.00\(absc.5\)c0 | |
| cpe:2.3:h:zyxel:nbg6818:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:zyxel:nbg7815_firmware:*:*:*:*:*:*:*:* | 1 | OR | 1.00\(absk.7\)c0 | |
| cpe:2.3:h:zyxel:nbg7815:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:zyxel:wsq20_firmware:*:*:*:*:*:*:*:* | 1 | OR | 1.00\(abof.11\)c0 | |
| cpe:2.3:h:zyxel:wsq20:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:zyxel:wsq50_firmware:*:*:*:*:*:*:*:* | 1 | OR | 2.20\(abkj.7\)c0 | |
| cpe:2.3:h:zyxel:wsq50:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:zyxel:wsq60_firmware:*:*:*:*:*:*:*:* | 1 | OR | 2.20\(abnd.8\)c0 | |
| cpe:2.3:h:zyxel:wsq60:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:zyxel:wsr30_firmware:*:*:*:*:*:*:*:* | 1 | OR | 1.00\(abmy.12\)c0 | |
| cpe:2.3:h:zyxel:wsr30:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:M/Au:N/C:C/I:C/A:C
- Access Vector
- LOCAL
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- COMPLETE
- Integrity Impact
- COMPLETE
- Availability Impact
- COMPLETE
- Base Score
- 6.9
- Severity
- MEDIUM
- Exploitability Score
- 3.4
- Impact Score
- 10
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 7.8
- Base Severity
- HIGH
- Exploitability Score
- 1.8
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| 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 |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-35033 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35033 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:29:40 | Added to TrackCVE | |||
| 2022-12-05 15:07:10 | 2021-11-23T22:15Z | 2021-11-23T22:15:07 | CVE Published Date | updated |
| 2022-12-05 15:07:10 | 2022-10-27T16:59:30 | CVE Modified Date | updated | |
| 2022-12-05 15:07:10 | Analyzed | Vulnerability Status | updated |