CVE-2026-5039
Predictable Default Cryptographic Key Used for DES Encryption in TP-Link TL-WL841N
- State
- Published
- Severity
- 6.1 Medium
- Published
- Apr 23, 2026
- Updated
- Apr 28, 2026
- Reserved
- Mar 27, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.1 Medium | 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 | TPLink |
Weaknesses
- CWE-1394 Use of default cryptographic key
Affected Products
| Product | Versions |
|---|---|
TL-WL841N v13TP-Link Systems Inc. |
|
References
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