CVE-2026-31848 — Reversible ecos_pw Cookie Allows Authentication Bypass in Nexxt Nebula 300+
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…
Published: 2026-03-23 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7