CVE-2026-31848

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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. This allows unauthorized administrative access to protected endpoints.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

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

29 Apr 2026, 17:45

Type Values Removed Values Added
References () https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip - () https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip - Product
References () https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/ - () https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/ - Product
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.8
First Time Nexxtsolutions nebula300plus Firmware
Nexxtsolutions
Nexxtsolutions nebula300plus
CPE cpe:2.3:o:nexxtsolutions:nebula300plus_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:nexxtsolutions:nebula300plus:-:*:*:*:*:*:*:*

26 Mar 2026, 11:16

Type Values Removed Values Added
Summary
  • (es) El firmware de Nexxt Solutions Nebula 300+ hasta la versión 12.01.01.37 almacena material de autenticación administrativa en la cookie ecos_pw utilizando un formato codificado en Base64 reversible con un sufijo estático. Un atacante que obtiene o deriva este valor de cookie puede falsificar una sesión administrativa válida y obtener acceso no autorizado al dispositivo.
Summary (en) 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. (en) 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.

23 Mar 2026, 13:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-23 13:16

Updated : 2026-04-29 17:45

NVD link : CVE-2026-31848

Mitre link : CVE-2026-31848

CVE.ORG link : CVE-2026-31848

JSON object : View

Products Affected

nexxtsolutions

  • nebula300plus
  • nebula300plus_firmware
CWE
CWE-312

Cleartext Storage of Sensitive Information