CVE-2026-15469: Hard-coded Mesh Group Private Key in TP-Link Deco XE75, XE5300, and WE10800
The use of hard-coded cryptographic key vulnerability has been identified in the mesh functionality of Deco XE75 v3, XE5300 v3.6 and WE10800 v3.6. 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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
TP-Link Deco XE75to a version that resolves this vulnerability.Fixed in v3 - Upgrade
Upgrade
TP-Link Deco XE5300to a version that resolves this vulnerability.Fixed in v3.6 - Upgrade
Upgrade
TP-Link Deco WE10800to a version that resolves this vulnerability.Fixed in v3.6 - Compensating control
Restrict local network access to the affected mesh network so unauthenticated adjacent attackers with network access cannot impersonate a trusted mesh node or bypass mesh node authentication using the hard-coded Mesh Group Private Key.
Event History
Frequently Asked Questions
Does exploitation require valid device credentials or user interaction?
No. The issue can be exploited by an unauthenticated attacker without a device-specific credential, and the CVSS vector indicates no privileges or user interaction are required.
What access does an attacker need to attempt exploitation?
The attacker needs to obtain the affected firmware image and have local network access. The CVSS vector classifies the attack as adjacent, rather than describing direct Internet-based exploitation.
What could an attacker do after impersonating a mesh node?
Successful impersonation may bypass mesh node authentication and permit unauthorized changes to device or mesh configuration. The stated impact includes confidentiality, integrity, and availability of the affected environment.