EUVD-2026-12171Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
-
AccessAuthenticate to router
-
ExploitUpload malicious configuration file
-
ExecutionTrigger port-trigger processing
-
ImpactExecute OS commands as root
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization OS command sanitization, avoid shell exec
MITRE ATT&CK
2 techniques across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Authenticated access to TP-Link TL-WR802N v4, TL-WR841N v14, or TL-WR840N v6 router admin panel; ability to upload crafted configuration file via import function; port-trigger feature processing during config import. |
| Impact | Full system compromise — the attacker can execute any command with the privileges of the vulnerable application process. |
| Exploit ScenarioDerived | An attacker injects shell metacharacters (;, |, &&) into a parameter that is passed to a system command, causing additional commands to be executed. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Mar 13, 2026
Authenticated attackers can achieve root-level command execution on TP-Link TL-WR802N v4, TL-WR841N v14, and TL-WR840N v6 routers by uploading a malicious configuration file through the import function, exploiting improper input validation in the port-trigger processing logic. Successful exploitation grants complete control over the affected device, allowing full compromise of the router and any connected network. A patch is available for this high-severity vulnerability.
Earlier versions of this analysis (1)
RemediationAI
A vendor patch is available — apply it immediately. Avoid passing user input to system commands. Use language-specific APIs instead of shell commands. If unavoidable, use strict input validation and escaping.
Affected VersionsENISA
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Command injection allows an attacker to execute arbitrary OS commands on the host system through a vulnerable application that passes user input to system shells. This vulnerability is classified as OS Command Injection (CWE-78).
Know when Tl Wr802n V4 gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
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
Primary rating from Vendor (TPLink) · only source for this CVE.
CVSS VectorVendor: TPLink
Lifecycle Timeline
2DescriptionCVE.org
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.
Executive ViewAI
Organizations using TP-Link TL-WR802N face significant risk from CVE-2026-3227, a OS command injection vulnerability rated CVSS 8.5. Successful exploitation could allow attackers to execute arbitrary code or commands on affected systems, potentially leading to full system compromise. A patch is available and should be applied as part of regular vulnerability management.
Apply vendor patch. If immediate patching is not feasible: (1) Deploy WAF rules to block injection patterns; (2) Restrict network access to affected components; (3) Enable enhanced logging for suspicious activity.
Threat Intelligence Overview
NVD
CVE.org
EPSS
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
OS command injection occurs when an application passes unsanitized user input directly into system shell commands.
GitHub PoC
Exploit-DB