Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 stores administrative authentication material in the ecos_pw cookie using a reversible Base64-encoded format with a static suffix. An attacker who obtains or derives this cookie value can forge a valid administrative session and gain unauthorized access to the device.

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Fixes

Solution

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Workaround

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History

Tue, 24 Mar 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Nexxtsolutions
Nexxtsolutions nebula300+
Vendors & Products Nexxtsolutions
Nexxtsolutions nebula300+

Mon, 23 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 23 Mar 2026 12:45:00 +0000

Type Values Removed Values Added
Description Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 stores administrative authentication material in the ecos_pw cookie using a reversible Base64-encoded format with a static suffix. An attacker who obtains or derives this cookie value can forge a valid administrative session and gain unauthorized access to the device.
Title Reversible ecos_pw cookie allows administrative authentication in Nexxt Nebula 300+
Weaknesses CWE-312
References
Metrics cvssV4_0

{'score': 8.7, 'vector': '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: TuranSec

Published:

Updated: 2026-03-23T15:51:59.795Z

Reserved: 2026-03-09T18:20:23.399Z

Link: CVE-2026-31848

cve-icon Vulnrichment

Updated: 2026-03-23T15:16:35.967Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-23T13:16:30.490

Modified: 2026-03-23T14:31:37.267

Link: CVE-2026-31848

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-24T10:34:39Z

Weaknesses