As of our latest check on 2026-05-24, 81.91.92.99 (Web4U s.r.o., AS39790, Czechia) had 2 open ports (80, 443) and 62 known CVEs, 1 known to be exploited.
Known CVEs on this host
2open ports
0names pointing here
62known CVEs
1known exploited
Open ports and CVEs as of our latest check of this host, 2026-05-24.
CVEs by severity: CRITICAL 11HIGH 36MEDIUM 14LOW 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 counted: 2 only affect a particular platform; this host's is not known (http_server 2.4.59). See them
Not a Tor relay, not a VPN or privacy relay address, and not on a current public blocklist.
Services (2)
80/tcpHTTPApache/2.4.5962 CVEsfirst 2026-05-24 · last 2026-05-24
Status
301 Moved Permanently
Title
301 Moved Permanently
Server
Apache/2.4.59
Raw response
HTTP/1.1 301 Moved Permanently
Date: Sun, 24 May 2026 02:32:13 GMT
Server: Apache/2.4.59
Location: https://www.fichtlkramek.cz/
Content-Length: 236
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>301 Moved Permanently</title>
</head><body>
<h1>Moved Permanently</h1>
<p>The document has moved <a href="https://www.fichtlkramek.cz/">here</a>.</p>
</body></html>
443/tcpTLSfirst 2026-05-24 · last 2026-05-24
TLS
TLSv1.2
Certificate for
fichtlkramek.cz, www.fichtlkramek.cz
Issued by
R13
Valid
2026-03-31 → 2026-06-29
Raw response
HTTP/1.1 400 Bad Request
Date: Sun, 24 May 2026 02:32:13 GMT
Server: Apache/2.4.59
Content-Length: 362
Connection: close
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>400 Bad Request</title>
</head><body>
<h1>Bad Request</h1>
<p>Your browser sent a request that this server could not understand.<br />
Reason: You're speaking plain HTTP to an SSL-enabled server port.<br />
Instead use the HTTPS scheme to access this URL, please.<br />
</p>
</body></html>
Vulnerabilities
Only affects certain platforms (2)
These CVEs only apply when the software runs on a particular platform (for example Windows), and this host's platform is not known. They are not counted.
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.