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VulnerabilityPublished Updated

CVE-2025-2233: Samsung SmartThings · Improper Verification of Cryptographic Signature

Affects Samsung SmartThingsSource CVE Database V5

0

Not known to be exploited · CVSS 8.8 High.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.0 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 55% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Mar 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Samsung SmartThingsAffected
  • =000.054.00013
Fixed in–

AI-suggested

To mitigate CVE-2025-2233, organizations should immediately restrict network access to the SmartThings Hub Local API service on TCP port 8766, limiting it to trusted management networks only. Implement network segmentation to isolate IoT devices from critical infrastructure and corporate networks. Deploy intrusion detection and prevention systems (IDS/IPS) with signatures or heuristics to detect anomalous traffic targeting port 8766. Monitor network logs for unusual connection attempts or unauthorized access patterns to the SmartThings hub. Samsung should be engaged to provide a security patch or firmware update that properly verifies cryptographic signatures before authentication. Until a patch is available, consider disabling remote access features or using VPNs to secure management traffic. Regularly audit IoT device firmware versions and configurations to ensure compliance with security best practices. Additionally, educate users and administrators on the risks of exposing IoT management interfaces to untrusted networks.

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.

References

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