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TI-2021-03461 Aliases CVE-2021-20161GHSA-mx5q-v692-hx4m

Improper authentication in Trendnet AC2600 TEW-827DRU

Priority LOW 30CWE-287Published · Updated

Key facts

Attack vector
Physical
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
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-287.

Summary

Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient protections for the UART functionality. A malicious actor with physical access to the device is able to connect to the UART port via a serial connection. No username or password is required and the user is given a root shell with full control of the device.

Why it matters now

EPSS 0.00255 17th percentileScored 2026-11-07
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

VendorProductAffected versionsFixed inStatusSource
—Trendnet AC2600 TEW-827DRU2.08B01—No fix listedCNA
  • Trendnet AC2600 TEW-827DRU Vendor— Affected 2.08B01 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:trendnet:tew-827dru_firmware:2.08b01:*:*:*:*:*:*:*2.08b01VulnerableTRENDnet
cpe:2.3:h:trendnet:tew-827dru:2.0:*:*:*:*:*:*:*2.0Running onTRENDnet
  • 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

  1. 2026-10-02 Threatist record created from CVE-2021-20161
  2. 2026-10-03 Alias added: GHSA-mx5q-v692-hx4m

References

Advisory 1

  • 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