Security Advisory: Hard-coded Mesh Group Private Key in Deco XE75, XE5300, and WE10800 (CVE-2026-15469)

Vulnerability and Impact Description:

CVE-2026-15469: Hard-coded Mesh Group Private Key in Deco XE75, XE5300, and WE10800

The use of hard-coded cryptographic key vulnerability has been identified in the mesh functionality of certain Deco products. A shared RSA-512 mesh group private key is present in the affected firmware and is used by the mesh protocol for node authentication. An attacker who obtains the firmware image and has local network access may be able to authenticate as a mesh node without possessing a device-specific credential.

Successful exploitation may allow an unauthenticated adjacent attacker to impersonate a trusted mesh node and bypass mesh node authentication, which may permit unauthorized changes to device or mesh configuration, affecting confidentiality, integrity and availability.

CVSS v4.0 Score: 7.7 / High

CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

Affected Products/Versions and Fixes:

Recommendations:

We strongly recommend that users with affected devices take the following actions:

1. Update affected devices to the latest firmware version that fixed the vulnerability:

EN: Download for Deco XE75 | TP-Link

US: Download for Deco XE75 | TP-Link

Download for Deco XE5300 | TP-Link

Download for Deco WE10800 | TP-Link

Disclaimer:

This advisory is provided for informational purposes only and is subject to change without notice. The information is provided “as is” without warranties of any kind. TP-Link recommends that customers promptly apply available firmware updates or implement documented workarounds as provided in this advisory. Devices/systems that are not updated or mitigated as described may remain vulnerable, and TP-Link disclaims any responsibility or liability for any damages or losses arising from a failure to implement such updates.