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.

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Fixes

Solution

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Workaround

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History

Tue, 05 May 2026 14:15:00 +0000

Type Values Removed Values Added
First Time appeared Tp-link tl-wr841n
Tp-link tl-wr841n Firmware
CPEs cpe:2.3:h:tp-link:tl-wr841n:13.0:*:*:*:*:*:*:*
cpe:2.3:o:tp-link:tl-wr841n_firmware:*:*:*:*:*:*:*:*
Vendors & Products Tp-link tl-wr841n
Tp-link tl-wr841n Firmware
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Tue, 28 Apr 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Tp-link
Tp-link tl-wl841n
Vendors & Products Tp-link
Tp-link tl-wl841n

Thu, 23 Apr 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 23 Apr 2026 17:30:00 +0000

Type Values Removed Values Added
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.
Title Predictable Default Cryptographic Key Used for DES Encryption in TP-Link TL-WL841N
Weaknesses CWE-1394
References
Metrics cvssV4_0

{'score': 6.1, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: TPLink

Published:

Updated: 2026-04-28T17:45:30.438Z

Reserved: 2026-03-27T16:26:48.187Z

Link: CVE-2026-5039

cve-icon Vulnrichment

Updated: 2026-04-23T17:40:20.340Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-23T18:16:30.377

Modified: 2026-05-05T14:11:58.700

Link: CVE-2026-5039

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-28T15:00:14Z

Weaknesses