CVE-2021-35033

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 v3.0 7.8 HIGH
CVSS v2.0 6.9 MEDIUM

7.8^/10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.9^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:L/AC:M/Au:N/C:C/I:C/A:C

Exploitability : 3.4 / Impact : 10.0

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
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

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:zyxel:nbg6818_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:zyxel:nbg6818:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:zyxel:nbg7815_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:zyxel:nbg7815:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:zyxel:wsq20_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:zyxel:wsq20:-:*:*:*:*:*:*:*

Configuration 4 (hide)

AND

cpe:2.3:o:zyxel:wsq50_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:zyxel:wsq50:-:*:*:*:*:*:*:*

Configuration 5 (hide)

AND

cpe:2.3:o:zyxel:wsq60_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:zyxel:wsq60:-:*:*:*:*:*:*:*

Configuration 6 (hide)

AND

cpe:2.3:o:zyxel:wsr30_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:zyxel:wsr30:-:*:*:*:*:*:*:*

Information

Published : 2021-11-23 14:15

Updated : 2022-10-27 09:59

NVD link : CVE-2021-35033

Mitre link : CVE-2021-35033

JSON object : View

CWE

CWE-287

Improper Authentication

Products Affected

zyxel

wsq20_firmware
wsq60
nbg6818
wsr30
wsq50_firmware
wsq20
nbg7815
wsq50
wsr30_firmware
wsq60_firmware
nbg6818_firmware
nbg7815_firmware

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7.8 /10