What is CVE-2021-20151?

CVE-2021-20151 is a critical-severity vulnerability in Trendnet Tew-827dru, classified under Session Fixation. CVSS score: 10.0/10. Published 2021-12-30.

How severe is CVE-2021-20151?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Is CVE-2021-20151 known to be exploited?

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

Vulnerability in Trendnet Tew-827dru

CVE-2021-20151

Trendnet AC2600 TEW-827DRU version 2.08B01 contains a flaw in the session management for the device. The router's management software manages web sessions based on IP address rather than verifying client cookies/session tokens/etc. This allows an attacker (whether from a different computer, different web browser on the same machine, etc.) to take over an existing session. This does require the attacker to be able to spoof or take over original IP address of the original user's session.

EPSS: 0.016 (73.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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-384 — Session Fixation

Public proof-of-concept exploits

References

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

Frequently asked questions

What is CVE-2021-20151?: CVE-2021-20151 is a critical-severity vulnerability in Trendnet Tew-827dru, classified under Session Fixation. CVSS score: 10.0/10. Published 2021-12-30.
How severe is CVE-2021-20151?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2021-20151 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.