CVE-2026-102812: Hardcoded AES-128 Key and Fixed IV in Configuration Backup Encryption in TP-Link RE305 and Archer C7
A hard-coded cryptographic key vulnerability exists in the user-configuration backup mechanism of TP-Link RE305 V3 and Archer C7 V5. A fixed AES-128 key and initialization vector are embedded in the firmware configuration-management component. An attacker who obtains an affected configuration backup file may extract the cryptographic material from the firmware and use it to decrypt the backup.
Successful exploitation may disclose sensitive configuration information contained in a backup file, including administrator passwords and Wi-Fi credentials.
Affected Software
Event History
Frequently Asked Questions
What must an attacker obtain to exploit this issue?
The attacker needs an affected configuration backup file. They can then extract the embedded AES-128 key and fixed initialization vector from the firmware to decrypt the backup.
What information could be exposed if a backup is decrypted?
Decrypted backups may disclose sensitive configuration data, including administrator passwords and Wi-Fi credentials.
Which devices are identified as affected?
The affected products identified are TP-Link RE305 V3 and TP-Link Archer C7 V5.