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CVE PROGRAM SOURCE RECORD6.1 Medium

CVE-2026-5039

Predictable Default Cryptographic Key Used for DES Encryption in TP-Link TL-WL841N

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

TP-Link Systems Inc. TL-WL841N v13

Default version status: unaffected

  • 0 to < 0.9.1 Build 20231120 Rel.62366affected

References