CVE•Published 2026-03-23•Modified 2026-04-29•1 article on news•7 live references•NVD data
CVE-2026-31851Nexxtsolutions · Nebula300plus_firmware
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
11
Exploit Prediction Scoring System · top 89% of all CVEs
Weaknesses (CWE)
Description
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.
Timeline
Published 2026-03-23
Modified 2026-04-29
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-31851Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Nebula300plus Firmware"Hosts Shodan identified as running Nebula300plus Firmware.
More intel sources (5)
Shodan report
vuln:CVE-2026-31851Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-31851Censys host search filtered to this CVE id.
grep.app
CVE-2026-31851Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-31851GitHub code search for direct mentions.
Google dork
"CVE-2026-31851" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-31851 on GitHub.