VULNERABILITY INTELLIGENCE

CVE-2026-31848

CVSS score9.8 CRITICAL

EPSS probability0.29%

CISA KEVNot currently listed

Published2026-03-23

Last modified2026-08-10

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.