Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nexxtsolutions | Nebula300Plus Firmware | <= 12.01.01.37 |
| Nexxtsolutions | Nebula300Plus | - |
Related Weaknesses (CWE)
References
- https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.0Product
- https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/Product
FAQ
What is CVE-2026-31848?
CVE-2026-31848 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 en...
How severe is CVE-2026-31848?
CVE-2026-31848 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-31848?
Check the references section above for vendor advisories and patch information. Affected products include: Nexxtsolutions Nebula300Plus Firmware, Nexxtsolutions Nebula300Plus.