CVE-2021-20158
Trendnet AC2600 TEW-827DRU version 2.08B01 contains an authentication bypass vulnerability. It is...
Trendnet AC2600 TEW-827DRU version 2.08B01 contains an authentication bypass vulnerability. It is possible for an unauthenticated, malicous actor to force the change of the admin password due to a hidden administrative command.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Trendnet AC2600 TEW-827DRU version 2.08B01 contains an authentication bypass vulnerability. It is possible for an unauthenticated, malicous actor to force the change of the admin password due to a hidden administrative command.
- Record
CVE-2021-20158- 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 - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-306
- Updated
- 2026-11-02
CVE List No score
Trendnet AC2600 TEW-827DRU version 2.08B01 contains an authentication bypass vulnerability. It is possible for an unauthenticated, malicous actor to force the change of the admin password due to a hidden administrative command.
- Record
CVE-2021-20158- Updated
- 2026-11-02
EUVDEUVD-2021-7615 No score
Trendnet AC2600 TEW-827DRU version 2.08B01 contains an authentication bypass vulnerability. It is possible for an unauthenticated, malicous actor to force the change of the admin password due to a hidden administrative command.
- Record
EUVD-2021-7615- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3r6m-8r6h-j558
Trendnet AC2600 TEW-827DRU version 2.08B01 contains an authentication bypass vulnerability. It is...
Trendnet AC2600 TEW-827DRU version 2.08B01 contains an authentication bypass vulnerability. It is possible for an unauthenticated, malicous actor to force the change of the admin password due to a hidden administrative command.
- Record
GHSA-3r6m-8r6h-j558- 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 - Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Nuclei | Trendnet AC2600 TEW-827DRU 2.08B01 - Admin Password Change |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, Nuclei, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-20158 is a critical vulnerability (CVSS 9.8) in Trendnet Tew-827dru Firmware, published December 30, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 9.62%, the 95th percentile. No source names a fixed version.