TI-2021-03465 Aliases CVE-2021-20165 GHSA-2fwv-796r-67vv

Cross-site request forgery in Trendnet AC2600 TEW-827DRU

LOW 39CWE-352Published 2021-12-30 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Tampering
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-352.

Summary

Trendnet AC2600 TEW-827DRU version 2.08B01 does not properly implement csrf protections. Most pages lack proper usage of CSRF protections or mitigations. Additionally, pages that do make use of CSRF tokens are trivially bypassable as the server does not appear to validate them properly (i.e. re-using an old token or finding the token thru some other method is possible).

Why it matters now

EPSS 0.00649 51st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	Trendnet AC2600 TEW-827DRU	2.08B01	—	No fix listed	CNA

Trendnet AC2600 TEW-827DRU Vendor— Affected 2.08B01 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:trendnet:tew-827dru_firmware:2.08b01:::::::*	2.08b01	Vulnerable	TRENDnet
cpe:2.3:h:trendnet:tew-827dru:2.0:::::::*	2.0	Running on	TRENDnet

cpe:2.3:o:trendnet:tew-827dru_firmware:2.08b01:*:*:*:*:*:*:* Versions 2.08b01 Vulnerable ·TRENDnet
cpe:2.3:h:trendnet:tew-827dru:2.0:*:*:*:*:*:*:* Versions 2.0 Running on ·TRENDnet

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-20165
2026-10-03 Alias added: GHSA-2fwv-796r-67vv
2026-10-23 EPSS moved to the 50th–90th percentile

References

Exploit 1

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

TI-2024-18847 There is a command injection vulnerability in the TRENDnet TEW-827DRU router with… CVSS 3.1CRITICAL 10.0
TI-2024-18846 There is a command injection vulnerability in the TRENDnet TEW-827DRU router with… CVSS 3.1HIGH 8.8
TI-2024-24383 TRENDnet TEW-827DRU devices through 2.06B04 contain a stack-based buffer overflow in the… CVSS 3.1HIGH 8.1
TI-2021-03458 Missing authentication in Trendnet AC2600 TEW-827DRU CVSS 3.1CRITICAL 9.8
TI-2019-09962 TRENDnet TEW-827DRU with firmware up to and including 2.04B03 contains multiple command… CVSS 3.0CRITICAL 9.8
TI-2021-03450 Missing authentication in Trendnet AC2600 TEW-827DRU CVSS 3.1MEDIUM 5.3

See all 41 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences