CVE-2026-31848
Reversible ecos_pw Cookie Allows Authentication Bypass in Nexxt Nebula 300+
- State
- Published
- Severity
- 8.7 High
- Published
- Mar 23, 2026
- Updated
- Aug 10, 2026
- Reserved
- Mar 9, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 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 | TuranSec |
Weaknesses
- CWE-312 Cleartext Storage of Sensitive Information
Affected Products
| Product | Versions |
|---|---|
Nebula 300+Nexxt Solutions |
|
References
- Official product pagethird-party-advisory
- Firmware downloadthird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.