en
Index of /
since 1983, developing the free unix style operating system gnu, so that computer users can have the freedom to share and improve the software they use.
IndustryOriginGlobal rankRank in United States
Updated at The higher the score, the more externally observable protections the system has recorded. This page does not certify that the website is reputable, legitimate, or completely free of vulnerabilities.
As of September 21, 2026 at 14:22, ftp.gnu.org has a security score of 74.6/100 (grade C: “Fair”). CyStack’s automated assessment recorded 14 issues to review after completing 97.3% of applicable checks. The website owner should address “Known-exploited CVE candidates” first, then review the remaining items in order of impact.
At assessment time, CyStack did not find ftp.gnu.org or related infrastructure on any scam, phishing, or malware warning list after checking 5 online reputation sources. This result reflects external observations; it does not guarantee absolute safety or verify the organization’s legal status or reputation.
Check whether the website uses a secure connection and whether its HTTPS certificate remains valid.
Frequently asked questions
A valid SSL certificate still does not prove that ftp.gnu.org is safe, legitimate, or free of scam signals. For a more complete assessment, this report also checks phishing and malware, exposed email records, IPs and open ports, subdomains, technologies, and CVEs that may apply to observed versions.
ftp.gnu.org used a valid SSL certificate at assessment time, valid until October 29, 2026. This status may change when the certificate expires or the server configuration changes.
Review HTTPS and certificateData sources
CyStack compiles scan results from its internal cybersecurity monitoring systems, including CyStack VulnScan and CyStack Threat Intelligence, together with publicly available Internet data. The assessment only observes and analyzes information already available; it does not attempt unauthorized access, test passwords, send exploit code, or change or disrupt the assessed system.
CyStack VulnScan continuously discovers assets, validates vulnerabilities, and helps security teams prioritize remediation across the enterprise.
These 3 failed checks or warnings have the greatest impact on the result for ftp.gnu.org.
Why it matters
This check asks whether an applicable CVE candidate also appears in the CISA Known Exploited Vulnerabilities (KEV) catalog. A positive match means attackers have used that vulnerability in real incidents and warrants urgent investigation, but the installed software still needs to be confirmed as affected.
What to do
Verify the installed product immediately and follow the CISA and vendor instructions for mitigation, patching, or upgrading if it is affected.
Evidence and check scope
16 additional evidence fields are not shown here.
Identify website protection and check whether public IPs appear on warning lists.
Check domain and email settings that help prevent brand impersonation.
Evidence and check scope
Evidence and check scope
| SpamCop | Not listed |
| blocklist.de | Not listed |
| Spamhaus | Unavailable |
Recently completed assessments, prioritizing websites with a similar sector, country or security grade for easier comparison.
United States
