As of our latest check on 2026-05-24, 82.71.51.121 (Zen Internet Ltd, AS13037, United Kingdom) had 2 open ports (80, 443) and 5 known CVEs, 1 known to be exploited.
Known CVEs on this host
2open ports
0names pointing here
5known CVEs
1known exploited
Open ports and CVEs as of our latest check of this host, 2026-05-24.
CVEs by severity: HIGH 4MEDIUM 1
A match is an indication, not proof: it is based on the software version a service reported, and fixes are often backported without changing the version. See the list
Not a Tor relay, not a VPN or privacy relay address, and not on a current public blocklist.
Services (2)
80/tcpHTTPnginx/1.20.15 CVEsfirst 2026-05-24 · last 2026-05-24
Status
404 Not Found
Title
404 Not Found
Server
nginx/1.20.1
Raw response
HTTP/1.1 404 Not Found
Server: nginx/1.20.1
Date: Sun, 24 May 2026 15:01:21 GMT
Content-Type: text/html
Content-Length: 555
Connection: keep-alive
<html>
<head><title>404 Not Found</title></head>
<body>
<center><h1>404 Not Found</h1></center>
<hr><center>nginx/1.20.1</center>
</body>
</html>
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443/tcpTLSfirst 2026-05-24 · last 2026-05-24
TLS
TLSv1.2
Certificate for
caldav.qpok.net
Issued by
E8
Valid
2026-04-21 → 2026-07-20
Raw response
HTTP/1.1 400 Bad Request
Server: nginx/1.20.1
Date: Sun, 24 May 2026 15:01:21 GMT
Content-Type: text/html
Content-Length: 657
Connection: close
<html>
<head><title>400 The plain HTTP request was sent to HTTPS port</title></head>
<body>
<center><h1>400 Bad Request</h1></center>
<center>The plain HTTP request was sent to HTTPS port</center>
<hr><center>nginx/1.20.1</center>
</body>
</html>
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Vulnerabilities
Port history
Every port that has answered a connection on this address, and when. A port is listed as open above only when a service was identified on it. Times are UTC.