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

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-3227
StatePUBLISHED
AssignerTPLink
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-16 14:19:47 UTC
Updated2026-04-07 01:07:52 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v4.0 8.5 HIGH from f23511db-6c3e-4e32-a477-6aa17d310630

CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.005150000 probability, percentile 0.665710000 (date 2026-04-07)

Problem Types: CWE-78 | CWE-78 CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

VersionSourceTypeScoreSeverityVector
4.0f23511db-6c3e-4e32-a477-6aa17d310630Secondary8.5HIGHCVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS8.5HIGHCVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
3.1[email protected]Primary6.8MEDIUMCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS v4.0 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Attack Requirements
None
Privileges Required
High
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Tp-link Tl-wr802n v4 All All All
Operating System Tp-link Tl-wr802n Firmware All All All All
Hardware Tp-link Tl-wr840n 6 All All All
Operating System Tp-link Tl-wr840n Firmware All All All All
Hardware Tp-link Tl-wr841n 14 All All All
Operating System Tp-link Tl-wr841n Firmware All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA TP-Link Systems Inc. TL-WR802N V4 affected V4_260304 custom Linux
CNA TP-Link Systems Inc. TL-WR841N V14 affected V14_260303 custom Linux
CNA TP Link Systems Inc. TL-WR840N V6 affected V6_260304 custom Linux

References

ReferenceSourceLinkTags
www.tp-link.com/us/support/download/tl-wr841n/v14 f23511db-6c3e-4e32-a477-6aa17d310630 www.tp-link.com Product
www.tp-link.com/us/support/faq/5018 f23511db-6c3e-4e32-a477-6aa17d310630 www.tp-link.com Vendor Advisory
www.tp-link.com/en/support/download/tl-wr840n/v6 f23511db-6c3e-4e32-a477-6aa17d310630 www.tp-link.com Product
www.tp-link.com/en/support/download/tl-wr802n/v4 f23511db-6c3e-4e32-a477-6aa17d310630 www.tp-link.com Product
www.tp-link.com/us/support/download/tl-wr802n/v4 f23511db-6c3e-4e32-a477-6aa17d310630 www.tp-link.com Product
www.tp-link.com/en/support/download/tl-wr841n/v14 f23511db-6c3e-4e32-a477-6aa17d310630 www.tp-link.com Product
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: do4choo (github.com/do4choo) (en)

© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report