CVE-2026-31848

CriticalCVSS 9.8/10Last modified Aug 10, 2026

Description

Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 uses the ecos_pw cookie for authentication, which contains Base64-encoded credential data combined with a static suffix. Because the encoding is reversible and lacks integrity protection, an attacker can reconstruct or forge a valid cookie value without proper authentication.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-312

Affected software

No affected versions have been published.

Timeline

Published: Mar 23, 2026
Last modified: Aug 10, 2026
NVD status: Modified

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