CVE-2026-102812
Hardcoded AES-128 Key and Fixed IV in Configuration Backup Encryption in TP-Link RE305 and Archer C7
TP-Link Systems Inc. RE305 v3Network & edge
CVSS
6.9MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
What fixes it
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
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.
Text from CVE List
Affected versions 2
- RE305 v3affected: all versions before 1.1.8 Build 20260921 Rel. 42853CVE List
- Archer C7 v5affected: all versions before 1.3.1 Build 20260821 Rel. 41256CVE List
References 5
- tp-link.com/us/support/download/re305/v3/#FirmwareFixvia CVE List
- tp-link.com/en/support/download/re305/v3/#FirmwareFixvia CVE List
- tp-link.com/en/support/download/archer-c7/v5/#FirmwareFixvia CVE List
- tp-link.com/us/support/download/archer-c7/v5/#FirmwareFixvia CVE List
- tp-link.com/us/support/faq/5362/Advisoryvia CVE List