Alps Electric Remote Keyless Entry System R53R0 authentication replay

Summaryinfo

A vulnerability was found in Alps Electric Remote Keyless Entry System R53R0. It has been classified as problematic. This affects an unknown part. This manipulation causes authentication replay. This vulnerability appears as CVE-2026-49319. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Alps Electric Remote Keyless Entry System R53R0. It has been declared as problematic. Affected by this vulnerability is an unknown code block. The manipulation with an unknown input leads to a authentication replay vulnerability. The CWE definition for the vulnerability is CWE-294. A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Remote Keyless Entry System (RKES), using the 433 MHz key fob bearing FCC ID CWTR53R0 manufactured by ALPS ALPINE CO., LTD., is vulnerable to a roll-back attack against its rolling-code authentication.  An attacker within RF range who records two consecutive lock or unlock transmissions from a legitimate key fob can later replay the same pair of transmissions repeatedly. During testing, replaying the first captured transmission caused the RKES to enter a state in which replaying the second captured transmission resulted in a successful lock or unlock operation of the vehicle. Tested and confirmed on a 2024 Suzuki Swift (SWIFT ISG GLS AC 1.2 5P 4x2 TM).

The weakness was presented by Danilo Erazo. It is possible to read the advisory at fccid.io. This vulnerability is known as CVE-2026-49319 since 05/29/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/25/2026). The attack technique deployed by this issue is T1040 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Alps Electric

Name

• Remote Keyless Entry System

Version

• R53R0

CPE 2.3info

• 🔒

CPE 2.2info

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