CVE-2021-20150
published 2021-12-30CVE-2021-20150: Trendnet AC2600 TEW-827DRU version 2.08B01 improperly discloses information via redirection from the setup wizard. Authentication can be bypassed and a user…
PriorityP347medium5.3CVSS 3.1
AVNACLPRNUINSUCLINAN
EXPLOIT
EPSS
40.06%
98.5th percentile
Trendnet AC2600 TEW-827DRU version 2.08B01 improperly discloses information via redirection from the setup wizard. Authentication can be bypassed and a user may view information as Admin by manually browsing to the setup wizard and forcing it to redirect to the desired page.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| trendnet | tew-827dru_firmware | — | — |
Detection & IOCsextracted from sources · hover to see the quote
commandaction=setup_wizard_cancel&html_response_page=ftpserver.asp&html_response_return_page=ftpserver.asp↗
- →HTTP POST to /apply_sec.cgi with body containing 'action=setup_wizard_cancel' and redirect to 'ftpserver.asp' is the exploit trigger for CVE-2021-20150; a 200 OK response containing 'ftp_username', 'ftp_password', 'ftp_permission', and 'TEW-827DRU' in the body confirms successful credential disclosure. ↗
- →Response body containing all four strings — 'ftp_username', 'ftp_password', 'ftp_permission', and 'TEW-827DRU' — with a Content-Type of 'text/html' and HTTP 200 status indicates successful exploitation. ↗
- →Shodan/FOFA fingerprinting: devices with HTML body containing 'TEW-827DRU' or 'tew-827dru' are candidate targets for this vulnerability. ↗
- ·The vulnerability is specific to firmware version 2.08B01 of the Trendnet TEW-827DRU (CPE: cpe:2.3:o:trendnet:tew-827dru_firmware:2.08b01). Exploitation against other firmware versions is not confirmed. ↗
- ·The exploit requires no authentication (CWE-306) and is network-accessible (AV:N), meaning any unauthenticated remote attacker can trigger the setup wizard redirect to disclose FTP credentials. ↗
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N
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Nuclei
Trendnet AC2600 TEW-827DRU - Credentials Disclosure
nuclei·CVSS 5.3
CVE-2021-20150 [MEDIUM] Trendnet AC2600 TEW-827DRU - Credentials Disclosure
Trendnet AC2600 TEW-827DRU - Credentials Disclosure
Trendnet AC2600 TEW-827DRU version 2.08B01 improperly discloses information via redirection from the setup wizard. A user may view information as Admin by manually browsing to the setup wizard and forcing it to redirect to the desired page.
Template:
id: CVE-2021-20150
info:
name: Trendnet AC2600 TEW-827DRU - Credentials Disclosure
author: gy741
severity: medium
description: Trendnet AC2600 TEW-827DRU version 2.08B01 improperly discloses information via redirection from the setup wizard. A user may view information as Admin by manually browsing to the setup wizard and forcing it to redirect to the desired page.
impact: |
An attacker can obtain sensitive credentials, leading to unauthorized access to the router.
remediation: |
Update t
Nuclei
Trendnet AC2600 TEW-827DRU 2.08B01 - Admin Password Change
nuclei·CVSS 5.3
CVE-2021-20158 [MEDIUM] Trendnet AC2600 TEW-827DRU 2.08B01 - Admin Password Change
Trendnet AC2600 TEW-827DRU 2.08B01 - Admin Password Change
Trendnet AC2600 TEW-827DRU version 2.08B01 contains an authentication bypass vulnerability. It is possible for an unauthenticated, malicious actor to force change the admin password due to a hidden administrative command.
Template:
id: CVE-2021-20158
info:
name: Trendnet AC2600 TEW-827DRU 2.08B01 - Admin Password Change
author: gy741
severity: critical
description: Trendnet AC2600 TEW-827DRU version 2.08B01 contains an authentication bypass vulnerability. It is possible for an unauthenticated, malicious actor to force change the admin password due to a hidden administrative command.
impact: |
An attacker with authenticated access can gain unauthorized control over the affected device.
remediation: |
Upgrade to the latest firmwa
Tenable
Trendnet AC2600 TEW-827DRU Multiple Vulnerabilities
blogs_tenable·2021-12-30
Trendnet AC2600 TEW-827DRU Multiple Vulnerabilities
## Cloud Exposure
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## AI Exposure
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## OT/IoT Exposure
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## Identity Exposure
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## Business needs
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AWS security
Azure security
Cloud Security Posture Man
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2021-12-30
Published