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CVE-2026-5039 Details

Description

TP-Link TL-WR841N v13 uses DES-CBC encryption in the TDDPv2 debug protocol with a cryptographic key derived from default web management credentials, making the key predictable if device is left in default configuration. A network-adjacent attacker can exploit this weakness to gain unauthorized access to the protocol, read debug data, modify certain device configuration values, and trigger device reboot, resulting in loss of integrity and a denial-of-service condition.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://www.tp-link.com/us/support/download/tl-wr841n/v13/#Firmware	TPLink	Product

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-1394	Use of Default Cryptographic Key	TPLink

Affected Products

Product	Versions
tp-link tl-wr841n firmware	< 231120
CPE cpe:2.3:o:tp-link:tl-wr841n_firmware:::::::: Remediation No remediation found in references.
tp-link tl-wr841n	13.0
CPE cpe:2.3:h:tp-link:tl-wr841n:13.0:::::::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	TPLink
Jun 17, 2026	CVE Modified	CISA-ADP
May 5, 2026	Initial Analysis	[email protected]
Apr 23, 2026	New CVE Received	TPLink