Vulnerability Details CVE-2026-5039
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 3.3%
CVSS Severity
CVSS v3 Score 8.8
Products affected by CVE-2026-5039
-
cpe:2.3:h:tp-link:tl-wr841n:13.0
-
cpe:2.3:o:tp-link:tl-wr841n_firmware:-
-
cpe:2.3:o:tp-link:tl-wr841n_firmware:0.9.1_4.16
-
cpe:2.3:o:tp-link:tl-wr841n_firmware:0.9.1_4.18
-
cpe:2.3:o:tp-link:tl-wr841n_firmware:150310
-
cpe:2.3:o:tp-link:tl-wr841n_firmware:150616
-
cpe:2.3:o:tp-link:tl-wr841n_firmware:201216
-
cpe:2.3:o:tp-link:tl-wr841n_firmware:230506
-
cpe:2.3:o:tp-link:tl-wr841n_firmware:231119
-
cpe:2.3:o:tp-link:tl-wr841n_firmware:3.13.9
-
cpe:2.3:o:tp-link:tl-wr841n_firmware:3.16.9
-
cpe:2.3:o:tp-link:tl-wr841n_firmware:4.17.16_build_120201_rel.54750n