CVE-2026-31848
Insecure Cookie Storage in Nexxt Nebula 300+ Enables Admin Access
Publication date: 2026-03-23
Last updated on: 2026-04-29
Assigner: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| nexxtsolutions | nebula300plus_firmware | to 12.01.01.37 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-312 | The product stores sensitive information in cleartext within a resource that might be accessible to another control sphere. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in Nexxt Solutions Nebula 300+ firmware versions up to 12.01.01.37. The device stores administrative authentication information in a cookie named ecos_pw using a reversible Base64-encoded format combined with a static suffix. Because this encoding is reversible and predictable, an attacker who obtains or figures out the value of this cookie can create a valid administrative session without proper authorization.
How can this vulnerability impact me? :
An attacker who exploits this vulnerability can gain unauthorized administrative access to the affected device. This means they could potentially control the device, change configurations, disrupt network operations, or access sensitive information managed by the device.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know