CVE-2021-20149

Name: CVE-2021-20149
Creator: NVD / NIST
Published: 2021-12-30T22:15:08.58+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.43%

Last modified Jun 17, 2026

CVE-2021-20149 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient access controls for the WAN interface. The default iptables ruleset for governing access to services on the device only apply to IPv4. EPSS estimates a 1.43% chance of exploitation in the next 30 days.

Description

Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient access controls for the WAN interface. The default iptables ruleset for governing access to services on the device only apply to IPv4. All services running on the devices are accessible via the WAN interface via IPv6 by default.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.43%

69.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Trendnet	Tew-827dru Firmware	2.08b01

References

https://www.tenable.com/security/research/tra-2021-54Third Party Advisory
https://www.tenable.com/security/research/tra-2021-54Third Party Advisory

Timeline

Published: Dec 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20149?

How severe is CVE-2021-20149?

CVE-2021-20149 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.43% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20149?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20149?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST