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    CVE-2021-20156

    Trendnet AC2600 TEW-827DRU version 2.08B01 contains an improper access control configuration that could allow for a malicious firmware update. It is possible to manually install firmware that may be malicious in nature as there does not appear to be any signature validation done to determine if it is from a known and trusted source. This includes firmware updates that are done via the automated "check for updates" in the admin interface. If an attacker is able to masquerade as the update server, the device will not verify that the firmware updates downloaded are legitimate.

    Published:Dec 30, 2021
    Last Modified:Nov 21, 2024
    EPS:Dec 30, 2021
    EPSS Score:0.00095
    CVSS Score:6.5

    Affected Products

    Vendor
    Trendnet
    Product
    Tew-827dru
    Vendor
    Trendnet
    Product
    Tew-827dru Firmware

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-463 Padding Oracle Crypto Attack
    CAPEC-475 Signature Spoofing by Improper Validation

    Related CVEs

    CVE-2024-36728 (CVSS 8.1) — TRENDnet TEW-827DRU devices through 2.06B04 contain a stack-based buffer overflow in the ssi binary. The overf…
    CVE-2024-36729 (CVSS 6.3) — TRENDnet TEW-827DRU devices through 2.06B04 contain a stack-based buffer overflow in the ssi binary. The overf…
    CVE-2024-28353 (CVSS 8.8) — There is a command injection vulnerability in the TRENDnet TEW-827DRU router with firmware version 2.10B01. An…
    CVE-2024-28354 (CVSS 10) — There is a command injection vulnerability in the TRENDnet TEW-827DRU router with firmware version 2.10B01. An…
    CVE-2021-20165 (CVSS 8.8) — Trendnet AC2600 TEW-827DRU version 2.08B01 does not properly implement csrf protections. Most pages lack prope…
    CVE-2021-20164 (CVSS 4.9) — Trendnet AC2600 TEW-827DRU version 2.08B01 improperly discloses credentials for the smb functionality of the d…
    CVE-2021-20150 (CVSS 5.3) — Trendnet AC2600 TEW-827DRU version 2.08B01 improperly discloses information via redirection from the setup wiz…
    CVE-2021-20151 (CVSS 10) — Trendnet AC2600 TEW-827DRU version 2.08B01 contains a flaw in the session management for the device. The route…
    CVE-2021-20149 (CVSS 9.8) — Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient access controls for the WAN interface. The…
    CVE-2021-20163 (CVSS 4.9) — Trendnet AC2600 TEW-827DRU version 2.08B01 leaks information via the ftp web page. Usernames and passwords for…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High