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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: TPLinkFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: TPLinkFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: TPLinkFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: TPLinkAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| RE305 v3 TP-Link Systems Inc. |
≥ 0; < 1.1.8 Build 20260921 Rel. 42853 (affected, custom)
Other versions: unaffected |
CNA: TPLink |
| Archer C7 v5 TP-Link Systems Inc. |
≥ 0; < 1.3.1 Build 20260821 Rel. 41256 (affected, custom)
Other versions: unaffected |
CNA: TPLink |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.9 medium |
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | CNA: TPLink |
| 4.0 / 6.9 medium |
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: f23511db-6c3e-4e32-a477-6aa17d310630 |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://www.tp-link.com/us/support/download/re305/v3/#FirmwareCNA: TPLink · patch
- https://www.tp-link.com/en/support/download/re305/v3/#FirmwareCNA: TPLink · patch
- https://www.tp-link.com/en/support/download/archer-c7/v5/#FirmwareCNA: TPLink · patch
- https://www.tp-link.com/us/support/download/archer-c7/v5/#FirmwareCNA: TPLink · patch
- https://www.tp-link.com/us/support/faq/5362/CNA: TPLink · vendor-advisory
- https://www.tp-link.com/en/support/download/archer-c7/v5/#Firmwaref23511db-6c3e-4e32-a477-6aa17d310630
- https://www.tp-link.com/en/support/download/re305/v3/#Firmwaref23511db-6c3e-4e32-a477-6aa17d310630
- https://www.tp-link.com/us/support/download/archer-c7/v5/#Firmwaref23511db-6c3e-4e32-a477-6aa17d310630
- https://www.tp-link.com/us/support/download/re305/v3/#Firmwaref23511db-6c3e-4e32-a477-6aa17d310630
- https://www.tp-link.com/us/support/faq/5362/f23511db-6c3e-4e32-a477-6aa17d310630
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