CVE-2026-5039: Predictable Default Cryptographic Key Used for DES Encryption in TP-Link TL-WL841N
TP-Link Systems Inc. · TL-WL841N v13
Vendor fix available · Affected: TP-Link Systems Inc. TL-WL841N v13 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 2% of scored CVEs
DescriptionCVE.org
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 products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- TP-Link Systems Inc. · TL-WL841N v13before 0.9.1 Build 20231120 Rel.62366
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- TP-Link Systems Inc.
- Published
- April 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-5039 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.