CVE-2026-31848 (GCVE-0-2026-31848)

Vulnerability from cvelistv5 – Published: 2026-03-23 12:09 – Updated: 2026-03-26 10:45
VLAI?
Title
Reversible ecos_pw Cookie Allows Authentication Bypass in Nexxt Nebula 300+
Summary
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.
Severity ?
8.7 (High)
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-312 - Cleartext Storage of Sensitive Information
Assigner
References
Impacted products
Vendor Product Version
Nexxt Solutions Nebula 300+ Affected: <= 12.01.01.37
Create a notification for this product.
Credits
Angel Barre (call4pwn)
Show details on NVD website
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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