CVE-2026-31848

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:nexxtsolutions:nebula300plus_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:nexxtsolutions:nebula300plus:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-23 13:16

Updated : 2026-08-10 12:17

NVD link : CVE-2026-31848

Mitre link : CVE-2026-31848

CVE.ORG link : CVE-2026-31848

JSON object : View

Products Affected

nexxtsolutions

nebula300plus_firmware
nebula300plus

CWE

CWE-312

Cleartext Storage of Sensitive Information

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