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CVE-2020-24363

KEVTP-link TL-WA855RE Missing Authentication for Critical Function Vulnerability

TP-link TL-WA855RE contains a missing authentication for critical function vulnerability. This vulnerability could allow an unauthenticated attacker (on the same network) to submit a TDDP_RESET POST request for a factory reset and reboot. The attacker can then obtain incorrect access control by setting a new administrative password. The impacted products could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.

TP-Link TL-WA855RE V5 20200415-rel37464 devices allow an unauthenticated attacker (on the same network) to submit a TDDP_RESET POST request for a factory reset and reboot. The attacker can then obtain incorrect access control by setting a new administrative password.

CVSS 3.1 vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
PublishedAug 31, 2020
Last modifiedJun 17, 2026
Added to KEVSep 2, 2025
Remediation dueSep 23, 2025
    76
    Risk assessment · High

    Actively exploited. Patch immediately.

    Exploitation
    Confirmed in the wild (CISA KEV)
    Federal remediation deadline
    Overdue by 399 days
    CVSS
    8.8 HIGH
    EPSS (30-day exploit probability)
    22.2% · top 2% of all CVEs
    Weakness
    CWE-306
    Preconditions
    No privileges and no user interaction
    1. 1.Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
    2. 2.Treat as emergency change: patch or isolate internet-facing instances first.
    3. 3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.

    Assessment is derived automatically from the live signals above; verify against your own asset inventory.