What is CVE-2026-31848?

CVE-2026-31848 is a critical-severity vulnerability in Nexxt Solutions Nebula 300+, classified under Cleartext Storage of Sensitive Information. CVSS score: 9.8/10. Published 2026-03-23.

How severe is CVE-2026-31848?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Nexxt Solutions Nebula 300+

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 integrit…

EPSS: 0.000 (13.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Nexxt Solutions Nebula 300+ — versions <= 12.01.01.37
Nexxtsolutions Nebula300plus
Nexxtsolutions Nebula300plus_firmware

Weakness classification (CWE)

CWE-312 — Cleartext Storage of Sensitive Information

References

Official product page (Product)
Firmware download (Product)

Frequently asked questions

What is CVE-2026-31848?: CVE-2026-31848 is a critical-severity vulnerability in Nexxt Solutions Nebula 300+, classified under Cleartext Storage of Sensitive Information. CVSS score: 9.8/10. Published 2026-03-23.
How severe is CVE-2026-31848?: Critical severity. CVSS v3 base score is 9.8 out of 10.