CVE•Published 2026-03-23•Modified 2026-08-10•1 article on news•6 live references•NVD data
CVE-2026-31847Nexxtsolutions · Nebula300plus_firmware
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
35
Exploit Prediction Scoring System · top 65% of all CVEs
Weaknesses (CWE)
Description
Hidden functionality in the /goform/setSysTools endpoint in Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 allows remote enablement of a Telnet service. By sending a crafted POST request with parameters such as telnetManageEn=true and telnetPwd, an authenticated attacker can activate a Telnet service on port 23.
Timeline
Published 2026-03-23
Modified 2026-08-10
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-2026-31847Hosts 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-2026-31847Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-31847Censys host search filtered to this CVE id.
grep.app
CVE-2026-31847Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-31847GitHub code search for direct mentions.
Google dork
"CVE-2026-31847" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-31847 on GitHub.