CVE-2026-40620: x3500 Missing Auth (CVSS 9.8)

Description

A vulnerability in SenseLive X3050’s embedded management service allows full administrative control to be established without any form of authentication or authorization on the SenseLive config application. The service accepts management connections from any reachable host, enabling unrestricted modification of critical configuration parameters, operational modes, and device state through a vendor-supplied or compatible client.

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CVSS v3.1 Score

9.8

CRITICAL

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

EPSS — Exploit Prediction

0.0010

Probability of exploitation

0.27%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-306 Missing Authentication

Affected Products

Vendor	Product	Versions
senselive	x3500_firmware	All
senselive	x3500	All

References

Other References

https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-111-12.json https://senselive.io/contact https://www.cisa.gov/news-events/ics-advisories/icsa-26-111-12

Frequently Asked Questions

What is CVE-2026-40620? +

A vulnerability in SenseLive X3050’s embedded management service allows full administrative control to be established without any form of authentication or authorization on the SenseLive config application. The service accepts management connections from any reachable host, enabling unrestricted modification of critical configuration parameters, operational modes, and device state through a vendor-supplied or compatible client. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-40620? +

CVE-2026-40620 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0010, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-40620? +

CVE-2026-40620 affects products from senselive, specifically: x3500, x3500_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-40620? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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