81.91.84.232 — 3 open ports, 30 known CVEs, network Web4U s.r.o.

Known CVEs on this host

3open ports

0names pointing here

30known CVEs

0known exploited

Open ports and CVEs as of our latest check of this host, 2026-05-24.

CVEs by severity: CRITICAL 1 HIGH 5 MEDIUM 18 LOW 6

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: 21 on a distribution build — the fix may be backported (openssh 6.0p1). See them

Network: Web4U s.r.o. AS39790
Open ports: 22, 80, 443 · at our latest check, 2026-05-24
Location: Czechia CZ
Hostname: srv1.ora.cz · reverse DNS, checked 2026-10-04
Route: 81.91.80.0/21 · announced by Web4U s.r.o. AS39790 RPKI valid
Organisation: Web4U s.r.o. · Content / hosting
Registry network: WEB4U-NET-CUST-84 · 81.91.84.0 - 81.91.84.255 · Web4U s.r.o. · RIPE
Abuse contact: [email protected] · for WEB4U-NET-CUST-84
First seen: 2026-05-24 02:32 UTC
Last seen alive: 2026-05-24 02:33 UTC
Hosted domains: No host name points here

Reputation

Not a Tor relay, not a VPN or privacy relay address, and not on a current public blocklist.

Services (3)

22/tcp SSH OpenSSH_6.0p1 30 CVEs first 2026-05-24 · last 2026-05-24

Server: SSH-2.0-OpenSSH_6.0p1 Debian-4+deb7u6
Host key: ssh-rsa 3daeca13d479fbdb…

Raw response

SSH-2.0-OpenSSH_6.0p1 Debian-4+deb7u6

80/tcp HTTP Apache first 2026-05-24 · last 2026-05-24

Status: 200 OK
Server: Apache

Raw response

HTTP/1.1 200 OK
Date: Sun, 24 May 2026 02:32:30 GMT
Server: Apache
Last-Modified: Mon, 17 Mar 2014 14:32:06 GMT
ETag: "a6de6-13-4f4ce48a42580"
Accept-Ranges: bytes
Content-Length: 19
Content-Type: text/html

<h1>It works!</h1>

443/tcp TLS first 2026-05-24 · last 2026-05-24

TLS: TLSv1.2
Certificate for: vs251.server4u.cz
Issued by: vs251.server4u.cz
Valid: 2014-03-17 → 2024-03-14
Note: self-signed certificate

Raw response

<!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 />
<blockquote>Hint: <a href="https://vs251.server4u.cz/"><b>https://vs251.server4u.cz/</b></a></blockquote></p>
</body></html>

Vulnerabilities

Distribution build — the fix may be backported (21)

These CVEs were matched on software built by an operating-system distribution whose package revision the service does not show. Distributions often fix a flaw without changing the upstream version number, so whether this build is affected cannot be told from its version. They are not counted.

CVEs by severity: CRITICAL 1 HIGH 11 MEDIUM 9

CVE	Software
CVE-2016-1908 CRITICAL 9.8	openssh 6.0p1 · port 22
CVE-2015-5600 HIGH 8.1	openssh 6.0p1 · port 22
CVE-2016-0778 HIGH 8.1	openssh 6.0p1 · port 22
CVE-2015-8325 HIGH 7.8	openssh 6.0p1 · port 22
CVE-2016-10012 HIGH 7.8	openssh 6.0p1 · port 22
CVE-2010-5107 HIGH 7.5	openssh 6.0p1 · port 22
CVE-2016-10708 HIGH 7.5	openssh 6.0p1 · port 22
CVE-2016-6515 HIGH 7.5	openssh 6.0p1 · port 22
CVE-2014-1692 HIGH 7.3	openssh 6.0p1 · port 22
CVE-2016-10009 HIGH 7.3	openssh 6.0p1 · port 22
CVE-2015-6564 HIGH 7.0	openssh 6.0p1 · port 22
CVE-2016-10010 HIGH 7.0	openssh 6.0p1 · port 22
CVE-2014-2653 MEDIUM 6.5	openssh 6.0p1 · port 22
CVE-2016-0777 MEDIUM 6.5	openssh 6.0p1 · port 22
CVE-2015-6563 MEDIUM 6.4	openssh 6.0p1 · port 22
CVE-2016-3115 MEDIUM 6.4	openssh 6.0p1 · port 22
CVE-2016-10011 MEDIUM 6.2	openssh 6.0p1 · port 22
CVE-2016-6210 MEDIUM 5.9	openssh 6.0p1 · port 22
CVE-2017-15906 MEDIUM 5.3	openssh 6.0p1 · port 22
CVE-2015-5352 MEDIUM 4.3	openssh 6.0p1 · port 22
CVE-2014-2532 MEDIUM 4.2	openssh 6.0p1 · port 22

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.

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