CVE-2026-31848CRITICAL 9.8EPSS p19.6%

CVE-2026-31848CVE-2026-31848

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. This allows unauthorized administrative access to protected endpoints.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.28% probability of exploitation · percentile 19.6% · 2026-06-18T12:00:27Z
Published2026-03-23
Last modified2026-04-29

Underlying weaknesses· 1

CWE-312

References

  1. https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip
  2. https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/

1

TypeTargetConfidenceTier
WeaknessCleartext Storage of Sensitive Informationcwe-3120%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.