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CVE-2026-3227

Authenticated Command Injection on TP-Link TL-WR802N, TL-WR841N and TL-WR840N

No known exploitation. EPSS puts it in the 88th percentile. Fixed versions are out.

CVSS 3.16.8MediumEPSS percentile88th3.0% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products5 fixed builds listed below
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Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • TP-Link Systems Inc. TL-WR802N v4Affected: < V4_260304Upgrade to: V4_260304Stated by: CVE record
  • TP-Link Systems Inc. TL-WR841N v14Affected: < V14_260303Upgrade to: V14_260303Stated by: CVE record
  • TP Link Systems Inc. TL-WR840N v6Affected: < V6_260304Upgrade to: V6_260304Stated by: CVE record
  • Tp-link Tl-wr802n FirmwareAffected: < 260304Upgrade to: 260304Stated by: NVD
  • Tp-link Tl-wr841n FirmwareAffected: < 260303Upgrade to: 260303Stated by: NVD

Versions as the sources state them. 1 more product has version data. Full version matrix after sign-in

What it is

From the CVE record

A command injection vulnerability was identified in TP-Link TL-WR802N v4, TL-WR841N v14, and TL-WR840N v6 due to improper neutralization of special elements used in an OS command. In the router configuration import function allows an authenticated attacker to upload a crafted configuration file that results in execution of OS commands with root privileges during port-trigger processing. Successful exploitation allows an authenticated attacker to execute system commands with root privileges, leading to full device compromise.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS88th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

3.0% chance of exploitation activity in the next 30 days, which ranks it in the 88th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

5 events over 110 days, from the signal feeds we watch.

  1. Patch availablerecord updated
  2. Publishedweakness classified, att&ck mapped

Affected products

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 6.8 by NVD.

How it is reached

  • Attack Vector AdjacentRequires access to the local network (e.g. same Wi-Fi, Bluetooth)
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required HighRequires admin or elevated privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 3 more references. See all after sign-in

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