CVE-2026-40621

Name: CVE-2026-40621
Creator: NVD / NIST
Published: 2026-05-13T13:16:42.75+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 0.49%

Last modified Jun 17, 2026

CVE-2026-40621 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. ELECOM wireless LAN access point devices do not require authentication to access some specific URLs. The affected product may be operated without authentication.. EPSS estimates a 0.49% chance of exploitation in the next 30 days.

Description

ELECOM wireless LAN access point devices do not require authentication to access some specific URLs. The affected product may be operated without authentication.

Metrics

CVSS 4.0

9.3/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS 3.0

9.8/10

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.49%

38.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-288

References

Timeline

Published: May 13, 2026
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2026-40621?

ELECOM wireless LAN access point devices do not require authentication to access some specific URLs. The affected product may be operated without authentication.

How severe is CVE-2026-40621?

CVE-2026-40621 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 0.49% probability of exploitation in the next 30 days.

How do I fix CVE-2026-40621?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-40621?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST