CVE-2026-31848 is an authentication bypass vulnerability affecting Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37. This flaw allows an attacker to forge valid authentication cookies because the `ecos_pw` cookie uses reversibly encoded credentials combined with a static suffix, lacking integrity protection. Rated 8.7 High on CVSSv4, this vulnerability can be exploited with low complexity from an adjacent network, leading to unauthorized administrative access and high impacts on confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, no public exploit code available, and minimal community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 12.01.01.37CPE matchmatch criteria | cpe:2.3:o:nexxtsolutions:nebula300plus_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.