CVE-2025-2233 Samsung SmartThings Improper Verification of Cryptographic Signature Authentication Bypass Vulnerability

High 8.8 Published 11 Mar 2025 Updated 26 Feb 2026

Network-adjacent attackers can bypass authentication on Samsung SmartThings Hubs due to improper cryptographic signature verification in the local API.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-2233?

CVE-2025-2233 is a high-severity authentication bypass vulnerability in Samsung SmartThings, published on 11 Mar 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Samsung SmartThings Improper Verification of Cryptographic Signature Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Samsung SmartThings. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the Hub Local API service, which listens on TCP port 8766 by default. The issue results from the lack of proper verification of a cryptographic signature. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-25615.

Weakness: CWE-347

Which versions are affected by CVE-2025-2233?

It affects 1 product.

Products include Samsung Smartthings.

How do I fix CVE-2025-2233?

No fix has been published for CVE-2025-2233 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2025-2233 being exploited?

There is no known exploitation of CVE-2025-2233 in the wild and no public exploit code.

Sources

Also known as GHSA-hpm7-4h9p-phg8.