What is CVE-2026-31846?

CVE-2026-31846 is a medium-severity vulnerability in Nexxt Solutions Nebula 300+ / Tenda F3 V2.0 Firmware, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-03-23.

How severe is CVE-2026-31846?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Nexxt Solutions Nebula 300+ / Tenda F3 V2.0 Firmware

CVE-2026-31846

Missing authentication in the /goform/ate endpoint in Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 allows an adjacent unauthenticated attacker to retrieve sensitive device information, including the administrator password. An attacker can decode this value to obtain valid administrative credentials and authenticate to the device.

Vulnerability class: Broken Authentication

EPSS: 0.003 (16.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Nexxt Solutions Nebula 300+ / Tenda F3 V2.0 Firmware — versions <= 12.01.01.37

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (product)
309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (product)

Frequently asked questions

What is CVE-2026-31846?: CVE-2026-31846 is a medium-severity vulnerability in Nexxt Solutions Nebula 300+ / Tenda F3 V2.0 Firmware, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-03-23.
How severe is CVE-2026-31846?: Medium severity. CVSS v3 base score is 6.5 out of 10.