Summary
| Parameter | Value |
|---|---|
| CVE ID | CVE-2026-41446 |
| Alert Source | GitHub Advisory - Critical Vulnerability |
| CVE Publication Year | 2026 |
| Date Published | 2026-04-29 |
| Vendor | Snap One |
| Product | WattBox 800/820 |
| CVSS Score | 9.8 (critical) |
| EPSS Score | 0.1% (percentile: 21%) |
| CISA KEV | No |
| Ransomware | Not confirmed |
Vulnerability 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.
Required Actions
Update Snap One WattBox 800/820 firmware to version 2.10.0.0 or newer immediately. Until updated, restrict network access to a trusted management VLAN and never expose these devices to the public internet. Pay attention to the supply chain - photos or technical documentation showing device labels can disclose effective credentials.
Who Is Affected?
This vulnerability affects WattBox 800/820 by Snap One. Check whether your organization uses these managed PDUs and roll out the firmware update along with an access-control review.
Sources
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