What is CVE-2021-20158?

CVE-2021-20158 is a critical-severity vulnerability in Trendnet Tew-827dru, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2021-12-30.

How severe is CVE-2021-20158?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-20158 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Trendnet Tew-827dru

CVE-2021-20158

Trendnet AC2600 TEW-827DRU version 2.08B01 contains an authentication bypass vulnerability. It is possible for an unauthenticated, malicous actor to force the change of the admin password due to a hidden administrative command.

Vulnerability class: Broken Authentication

EPSS: 0.108 (95.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Trendnet Tew-827dru — versions 2.0
Trendnet Tew-827dru_firmware — versions 2.08b01
N/a Trendnet Ac2600 Tew-827dru — versions 2.08B01

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

Public proof-of-concept exploits

References

vulnreport@tenable.com (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-20158?: CVE-2021-20158 is a critical-severity vulnerability in Trendnet Tew-827dru, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2021-12-30.
How severe is CVE-2021-20158?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-20158 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.