CVE-2021-20149

9.8 criticalEPSS 1.5%

Critical (9.8) in trendnet tew-827dru firmware. EPSS 1.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.8 critical

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

EPSS: 1.5% chance of exploitation in the next 30 days; higher than 74% of CVEs (scores of 2026-10-31)
CWE: CWE-863
Published: 2021-12-30
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

trendnet:tew-827dru_firmware

References

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

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