CVE-2026-31851CWE-307

Nexxt Nebula 300+ - Lack of Rate Limiting Enables Brute-Force Attacks

High · published March 23, 2026

CVSS v4.0
7.7
EPSS
1%
Percentile
52.7
In the wild
Unconfirmed
What it is

Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 does not implement rate limiting or account lockout mechanisms on authentication interfaces. An attacker can perform unlimited authentication attempts against endpoints that rely on credential validation, enabling brute-force attacks to guess administrative credentials without restriction.

The record
Technical detail
CVSS v4.0
7.7 · HIGH
Vector
CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00703 · 52.7th percentile
Weakness
CWE-307 · Improper Restriction of Excessive Authentication Attempts
Published
2026-03-23T12:21Z
EPSS history
Timeline
  • 23 MAR 12:21Z
    Lack of Rate Limiting Enables Brute-Force Attacks in Nexxt Nebula 300+
    cvelistv5