CVE-2026-41446

Critical

Published: 28 April 2026

Published

28 April 2026

Modified

30 April 2026

KEV Added

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Patch

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CVSS Score 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0008 24.4th percentile

Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-41446 is a critical-severity Use of Hard-coded Credentials (CWE-798) vulnerability in Snapone (inferred from references). Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 24.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 CM-7 (Least Functionality) and IA-5 (Authenticator Management).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-2 Flaw Remediation good match

prevent

Flaw remediation requires timely installation of firmware updates like version 2.10.0.0, which directly addresses the exposed diagnostic endpoints and weak authentication.

IA-5 Authenticator Management good match

prevent

Authenticator management prohibits hard-coded or weak authenticators such as the device's MAC address and service tag printed in plaintext on the label.

CM-7 Least Functionality good match

prevent

Least functionality eliminates unnecessary diagnostic endpoints that enable attackers to execute arbitrary root commands after weak authentication.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1059.004 Unix Shell Execution

Adversaries may abuse Unix shell commands and scripts for execution.

attack.mitre.org →

Why these techniques?

Exposed diagnostic HTTP endpoints with weak MAC/service tag auth enable remote exploitation of public-facing application (T1190); leads directly to arbitrary root command execution (T1059.004 Unix Shell).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

Snap One WattBox 800 and 820 series firmware versions prior to 2.10.0.0 contain undisclosed diagnostic HTTP endpoints that require only the device MAC address and service tag for authentication, both of which are printed in plaintext on the physical device…

label. Attackers with access to the device label or documentation containing these values can authenticate to the several endpoints and execute arbitrary commands as root on the device.

Deeper analysisAI

Snap One WattBox 800 and 820 series devices running firmware versions prior to 2.10.0.0 are affected by CVE-2026-41446, a vulnerability involving undisclosed diagnostic HTTP endpoints. These endpoints use weak authentication that relies solely on the device's MAC address and service tag, both of which are printed in plaintext on the physical device label. This flaw, tied to CWE-798 (use of hard-coded credentials) and CWE-912 (hidden functionality), allows unauthorized access to sensitive diagnostic features.

Attackers who obtain the MAC address and service tag—through physical access to the device label, documentation, or other means—can remotely authenticate to the endpoints over the network with no privileges required. Successful exploitation enables execution of arbitrary commands as root on the device, potentially leading to full compromise, including high confidentiality, integrity, and availability impacts, as reflected in the CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

The vendor's firmware release notes at https://help.snapone.com/wb-8x0-fw/Content/FW%20RN/8x0/8x0%20series%20FW%20RN.htm detail mitigation through upgrading to firmware version 2.10.0.0 or later, which addresses the exposed endpoints and authentication issues.