Lucene search

[email protected]CVE-2021-35033

HistoryNov 23, 2021 - 10:15 p.m.

CVE-2021-35033

2021-11-2322:15:07

CWE-260

CWE-287

[email protected]

web.nvd.nist.gov

cve-2021-35033

zyxel

router

firmware

vulnerability

root access

nvd

6.9 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.4 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

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.

Affected configurations

NVD

Node

zyxelnbg6818_firmwareRange<1.00\(absc.5\)c0

AND

zyxelnbg6818Match-

Node

zyxelnbg7815_firmwareRange<1.00\(absk.7\)c0

AND

zyxelnbg7815Match-

Node

zyxelwsq20_firmwareRange<1.00\(abof.11\)c0

AND

zyxelwsq20Match-

Node

zyxelwsq50_firmwareRange<2.20\(abkj.7\)c0

AND

zyxelwsq50Match-

Node

zyxelwsq60_firmwareRange<2.20\(abnd.8\)c0

AND

zyxelwsq60Match-

Node

zyxelwsr30_firmwareRange<1.00\(abmy.12\)c0

AND

zyxelwsr30Match-

CPENameOperatorVersion
zyxel:nbg6818_firmwarezyxel nbg6818 firmwarelt1.00\(absc.5\)c0

CPE	Name	Operator	Version
zyxel:nbg6818_firmware	zyxel nbg6818 firmware	lt	1.00\(absc.5\)c0

CNA Affected

[
  {
    "product": "NBG6818 series firmware",
    "vendor": "Zyxel",
    "versions": [
      {
        "status": "affected",
        "version": "1.00(ABSC.0)C0 through 1.00(ABSC.4)C0"
      }
    ]
  },
  {
    "product": "NBG7815 series firmware",
    "vendor": "Zyxel",
    "versions": [
      {
        "status": "affected",
        "version": "1.00(ABSK.0)C0 through 1.00(ABSK.6)C0"
      }
    ]
  },
  {
    "product": "WSQ20 series firmware",
    "vendor": "Zyxel",
    "versions": [
      {
        "status": "affected",
        "version": "1.00(ABOF.0)C0 through 1.00(ABOF.10)C0"
      }
    ]
  },
  {
    "product": "WSQ50 series firmware",
    "vendor": "Zyxel",
    "versions": [
      {
        "status": "affected",
        "version": "1.00(ABKJ.0)C0 through 2.20(ABKJ.6)C0"
      }
    ]
  },
  {
    "product": "WSQ60 series firmware",
    "vendor": "Zyxel",
    "versions": [
      {
        "status": "affected",
        "version": "1.00(ABND.0)C0 through 2.20(ABND.7)C0"
      }
    ]
  },
  {
    "product": "WSR30 series firmware",
    "vendor": "Zyxel",
    "versions": [
      {
        "status": "affected",
        "version": "1.00(ABMY.0)C0 through 1.00(ABMY.11)C0"
      }
    ]
  }
]

References

www.tenable.com/security/research/tra-2022-06

www.zyxel.com/support/Zyxel_security_advisory_for_pre-configured_password_management_vulnerability_of_home_routers_and_WiFi_systems.shtml

6.9 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.4 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

Related for CVE-2021-35033

prion1 cvelist1 nvd1