CVE-2026-3841: Command Injection Vulnerability in Telnet CLI on TP-Link TL-MR6400
TP-Link Systems Inc. · TL-MR6400 v5.3
Vendor fix available · Affected: TP-Link Systems Inc. TL-MR6400 v5.3 · Exploitation: possible (1 to 10%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 80% of scored CVEs
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- TP-Link Systems Inc. · TL-MR6400 v5.3before 1.9.0 Build 260108
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Possible (1 to 10%). EPSS between 1% and 10%.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- TP-Link Systems Inc.
- Published
- March 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-3841 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.