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THREAT OPS › Threat News › [NVD] CVE-2026-31848 (CRITICAL 9.8) — 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

[NVD] CVE-2026-31848 (CRITICAL 9.8) — 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

lownvdPublished 2026-03-23

CVE-2026-31848 CVSS: 9.8 CRITICAL Published: 2026-03-23T13:16:30.490

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 auth

Indicators of compromise

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-31848