TP-Link
CVE-2026-3841
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate to device Telnet CLI
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ExploitInput crafted command with injection payload
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ExecutionBypass insufficient sanitization in CLI parser
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ImpactExecute arbitrary system commands as root
Vulnerability Assessment
| Weakness |
CWE
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 | TP-Link TL-MR6400 v5.3 with Telnet CLI enabled; attacker must have valid administrative credentials and local network access (AV:A); vulnerable CLI operations with unfiltered command input processing |
| Impact | Exploitation requires authentication. |
| Exploit ScenarioDerived | An attacker (requires authentication) could exploit this vulnerability to full device compromise, including potential loss of confidentiality, integrity. |
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Alert meAnalysisAIv1 – Mar 12, 2026
A command injection vulnerability has been identified in the Telnet command-line interface (CLI) of TP-Link TL-MR6400 v5.3. This issue is caused by insufficient sanitization of data processed during specific CLI operations.
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Affects your stack
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Technical ContextAI · show details
Classified as CWE-78 (OS Command Injection). A command injection vulnerability has been identified in the Telnet command-line interface (CLI) of TP-Link TL-MR6400 v5.3. This issue is caused by insufficient sanitization of data processed during specific CLI operations. An authenticated attacker with elevated privileges may be able to execute arbitrary system commands. Successful exploitation may lead to full device compromise, including potential loss of confidentiality, integrity, and availability.
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- Exploit and PoC references, threat intelligence from 22 sources
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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 NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
A command injection vulnerability has been identified in the Telnet command-line interface (CLI) of TP-Link TL-MR6400 v5.3. This issue is caused by insufficient sanitization of data processed during specific CLI operations. An authenticated attacker with elevated privileges may be able to execute arbitrary system commands. Successful exploitation may lead to full device compromise, including potential loss of confidentiality, integrity, and availability.
Threat Intelligence Overview
NVD
CVE.org
EPSS
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.
Affected Products (CPE)CVE.org
Directory traversal vulnerability in TP-LINK Archer C5 (1.2) with firmware before 150317, C7 (2.0) with firmware before
cgi-bin/admin/servetest in TP-Link IP Cameras TL-SC3130, TL-SC3130G, TL-SC3171, TL-SC3171G, and possibly other models be
The PING function on the TP-Link TL-WR840N EU v5 router with firmware through TL-WR840N(EU)_V5_171211 is vulnerable to r
TP-LINK TL-WR840N(ES)_V6.20_180709 was discovered to contain a command injection vulnerability via the component oal_set
Stack-based buffer overflow in the run_init_sbus function in the KCodes NetUSB module for the Linux kernel, as used in c
Directory traversal vulnerability in the web-based management feature on the TP-LINK TL-WR841N router with firmware 3.13
TP-LINK TL-WR840N(ES)_V6.20_180709 was discovered to contain a command injection vulnerability via the component oal_sta
TP-Link Archer C7 and TL-WR841N routers contain an authenticated remote command execution vulnerability in the Parental
A vulnerability in the TP-Link Archer c20 router with firmware version V6.6_230412 and earlier permits unauthorized indi
Multiple stack-based buffer overflows in TP-Link WR940N WiFi routers with hardware version 4 allow remote authenticated
TP-LINK TL-WR840N(ES)_V6.20_180709 was discovered to contain a remote code execution (RCE) vulnerability via the functio
In TP-Link Router AX50 firmware 210730 and older, import of a malicious backup file via web interface can lead to remote
GitHub PoC
Exploit-DB