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    CVE-2021-44971

    Multiple Tenda devices are affected by authentication bypass, such as AC15V1.0 Firmware V15.03.05.20_multi?AC5V1.0 Firmware V15.03.06.48_multi and so on. an attacker can obtain sensitive information, and even combine it with authenticated command injection to implement RCE.

    Published:Jan 28, 2022
    Last Modified:Nov 21, 2024
    EPS:Jan 28, 2022
    EPSS Score:0.05503
    CVSS Score:9.8

    Affected Products

    Vendor
    Tenda
    Product
    Ac15
    Vendor
    Tenda
    Product
    Ac15 Firmware
    Vendor
    Tenda
    Product
    Ac5
    Vendor
    Tenda
    Product
    Ac5 Firmware

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-697 Incorrect Comparison

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-120 Double Encoding
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-15 Command Delimiters
    CAPEC-182 Flash Injection
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-41 Using Meta-characters in E-mail Headers to Inject Malicious Payloads
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-44 Overflow Binary Resource File
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-6 Argument Injection
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-73 User-Controlled Filename
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-88 OS Command Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities
    CAPEC-92 Forced Integer Overflow

    Related CVEs

    CVE-2026-11493 (CVSS 1.3) — A weakness has been identified in Tenda AC15 15.03.05.19. The impacted element is an unknown function of the f…
    CVE-2026-5830 (CVSS 7.4) — A vulnerability was identified in Tenda AC15 15.03.05.18. This affects the function websGetVar of the file /go…
    CVE-2026-4975 (CVSS 7.4) — A vulnerability has been found in Tenda AC15 15.03.05.19. This affects the function formSetCfm of the file /go…
    CVE-2026-24103 (CVSS 9.8) — A buffer overflow vulnerability was discovered in goform/formSetMacFilterCfg in Tenda AC15V1.0 V15.03.05.18_mu…
    CVE-2026-24101 (CVSS 9.8) — An issue was discovered in goform/formSetIptv in Tenda AC15V1.0 V15.03.05.18_multi. When the condition is met,…
    CVE-2026-24105 (CVSS 9.8) — An issue was discovered in goform/formsetUsbUnload in Tenda AC15V1.0 V15.03.05.18_multi. The value of `v1` was…
    CVE-2026-3400 (CVSS 7.4) — A security flaw has been discovered in Tenda AC15 up to 15.13.07.13. Affected by this issue is some unknown fu…
    CVE-2025-63666 (CVSS 9.8) — Tenda AC15 v15.03.05.18_multi) issues an authentication cookie that exposes the account password hash to the c…
    CVE-2025-11389 (CVSS 7.4) — A security flaw has been discovered in Tenda AC15 15.03.05.18. Affected is an unknown function of the file /go…
    CVE-2025-11388 (CVSS 7.4) — A vulnerability was identified in Tenda AC15 15.03.05.18. This impacts an unknown function of the file /goform…

    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