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Wa901nd FirmwareOperating system · Tp Link

CVE-2020-35575

CRITICAL · 9.8 CVSS v3.1 Published 2020-12-26
Fix available
A fix is available. Upgrade to 3.16.9 or later.
See remediation →
100/100
Remediation priority · Urgent
Public exploit Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A password-disclosure issue in the web interface on certain TP-Link devices allows a remote attacker to get full administrative access to the web panel. This affects WA901ND devices before 3.16.9(201211) beta, and Archer C5, Archer C7, MR3420, MR6400, WA701ND, WA801ND, WDR3500, WDR3600, WE843N, WR1043ND, WR1045ND, WR740N, WR741ND, WR749N, WR802N, WR840N, WR841HP, WR841N, WR842N, WR842ND, WR845N, WR940N, WR941HP, WR945N, WR949N, and WRD4300 devices.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Wa901nd FirmwareOperating system
Affected:< 3.16.9\(201211\)_beta
Archer C5 FirmwareOperating system
Affected:all versions
Archer C7 FirmwareOperating system
Affected:all versions
Mr3420 FirmwareOperating system
Affected:all versions
Mr6400 FirmwareOperating system
Affected:all versions
Wa701nd FirmwareOperating system
Affected:all versions
Wa801nd FirmwareOperating system
Affected:all versions
Wdr3500 FirmwareOperating system
Affected:all versions

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 3.16.9 or later
Fixed in 3.16.9
Recommended fix Moderate confidence

WA901ND: Firmware 3.16.9(201211) beta | Other models: Contact TP-Link for model-specific firmware updates

  1. For WA901ND devices: Navigate to the TP-Link download center and download firmware version 3.16.9(201211) beta or later
  2. Upload the firmware through the device's web management interface under System Tools > Firmware Upgrade
  3. For Archer C5, Archer C7, MR3420, MR6400, WA701ND, WA801ND, WDR3500 and other listed devices: Contact TP-Link support directly to verify if a firmware update addressing CVE-2020-35575 is available for your specific model
  4. If no firmware update is available, consider replacing affected devices with newer models that receive active security support
  5. Alternatively, restrict web interface access to trusted networks only using firewall rules or ACLs
Caveat Firmware upgrades on older TP-Link devices may reset configuration to defaults; backup current settings before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $2,300. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2020-35575 in production — separate from our analysis above.

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What belongs here
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  • Version or environment caveats, and links to real fixes
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