OSN

Host

81.91.84.239

Tags: End-of-life software

As of our latest check on 2026-05-24, 81.91.84.239 (Web4U s.r.o., AS39790, Czechia) had 3 open ports (22, 80, 443) and 215 known CVEs.

Known CVEs on this host

3open ports
0names pointing here
215known CVEs
0known exploited

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

CVEs by severity: CRITICAL 57 HIGH 90 MEDIUM 61 LOW 7

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: 75 on a distribution build — the fix may be backported (http_server 2.2.22, openssh 6.0p1). See them

Not counted: 1 fixed by the distribution (http_server 2.2.22). See them

Not counted: 5 only affect another platform (php 5.3.29, http_server 2.2.22). See them

Network
Web4U s.r.o. AS39790
Open ports
22, 80, 443 · at our latest check, 2026-05-24
Location
Czechia CZ
Hostname
www2.uvm.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+deb7u7
Host key
ssh-rsa 4a4accef54e5fe4c…
Raw response 
SSH-2.0-OpenSSH_6.0p1 Debian-4+deb7u7
80/tcp HTTP Apache/2.2.22 (Debian) 185 CVEs first 2026-05-24 · last 2026-05-24
Status
200 OK
Server
Apache/2.2.22 (Debian)
Powered by
PHP/5.3.29-1~dotdeb.0
Raw response 
HTTP/1.1 200 OK
Date: Sun, 24 May 2026 02:32:30 GMT
Server: Apache/2.2.22 (Debian)
X-Powered-By: PHP/5.3.29-1~dotdeb.0
Content-Length: 11
Content-Type: text/html

db2.uvm.cz
443/tcp HTTP first 2026-05-24 · last 2026-05-24
Raw response 
HTTP/1.1 200 OK
Date: Sun, 24 May 2026 02:32:30 GMT
Server: Apache/2.2.22 (Debian)
Last-Modified: Fri, 28 Mar 2008 12:05:54 GMT
ETag: "3e0009-2d-4497e1fbc8c80"
Accept-Ranges: bytes
Content-Length: 45
Content-Type: text/html

<html><body><h1>It works!</h1></body></html>

Vulnerabilities

Distribution build — the fix may be backported (75)

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. 1 of them is known to be exploited.

CVEs by severity: CRITICAL 14 HIGH 28 MEDIUM 32 LOW 1

CVESoftware
CVE-2021-40438 CRITICAL 9.0 known exploited http_server 2.2.22 · port 80
CVE-2016-1908 CRITICAL 9.8 openssh 6.0p1 · port 22
CVE-2017-3167 CRITICAL 9.8 http_server 2.2.22 · port 80
CVE-2017-3169 CRITICAL 9.8 http_server 2.2.22 · port 80
CVE-2017-7679 CRITICAL 9.8 http_server 2.2.22 · port 80
CVE-2021-39275 CRITICAL 9.8 http_server 2.2.22 · port 80
CVE-2021-44790 CRITICAL 9.8 http_server 2.2.22 · port 80
CVE-2022-22720 CRITICAL 9.8 http_server 2.2.22 · port 80
CVE-2022-31813 CRITICAL 9.8 http_server 2.2.22 · port 80
CVE-2026-28780 CRITICAL 9.8 http_server 2.2.22 · port 80
CVE-2017-9788 CRITICAL 9.1 http_server 2.2.22 · port 80
CVE-2022-22721 CRITICAL 9.1 http_server 2.2.22 · port 80
CVE-2022-28615 CRITICAL 9.1 http_server 2.2.22 · port 80
CVE-2026-42535 CRITICAL 9.1 http_server 2.2.22 · port 80
CVE-2026-24072 HIGH 8.8 http_server 2.2.22 · port 80
CVE-2026-93546 HIGH 8.8 http_server 2.2.22 · port 80
CVE-2025-58098 HIGH 8.3 http_server 2.2.22 · port 80
CVE-2015-5600 HIGH 8.1 openssh 6.0p1 · port 22
CVE-2016-0778 HIGH 8.1 openssh 6.0p1 · port 22
CVE-2016-5387 HIGH 8.1 http_server 2.2.22 · port 80
CVE-2015-8325 HIGH 7.8 openssh 6.0p1 · port 22
CVE-2016-10012 HIGH 7.8 openssh 6.0p1 · port 22
CVE-2006-20001 HIGH 7.5 http_server 2.2.22 · port 80
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-2016-8743 HIGH 7.5 http_server 2.2.22 · port 80
CVE-2017-9798 HIGH 7.5 http_server 2.2.22 · port 80
CVE-2018-1303 HIGH 7.5 http_server 2.2.22 · port 80
CVE-2021-34798 HIGH 7.5 http_server 2.2.22 · port 80
CVE-2022-22719 HIGH 7.5 http_server 2.2.22 · port 80
CVE-2022-29404 HIGH 7.5 http_server 2.2.22 · port 80
CVE-2022-30556 HIGH 7.5 http_server 2.2.22 · port 80
CVE-2023-31122 HIGH 7.5 http_server 2.2.22 · port 80
CVE-2026-29169 HIGH 7.5 http_server 2.2.22 · port 80
CVE-2026-34059 HIGH 7.5 http_server 2.2.22 · port 80
CVE-2025-49812 HIGH 7.4 http_server 2.2.22 · port 80
CVE-2014-1692 HIGH 7.3 openssh 6.0p1 · port 22
CVE-2016-10009 HIGH 7.3 openssh 6.0p1 · port 22
CVE-2023-38709 HIGH 7.3 http_server 2.2.22 · port 80
CVE-2015-6564 HIGH 7.0 openssh 6.0p1 · port 22
CVE-2016-10010 HIGH 7.0 openssh 6.0p1 · port 22
CVE-2014-0226 MEDIUM 6.8 http_server 2.2.22 · port 80
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-2016-4975 MEDIUM 6.1 http_server 2.2.22 · port 80
CVE-2026-29170 MEDIUM 6.1 http_server 2.2.22 · port 80
CVE-2016-6210 MEDIUM 5.9 openssh 6.0p1 · port 22
CVE-2018-1301 MEDIUM 5.9 http_server 2.2.22 · port 80
CVE-2018-1302 MEDIUM 5.9 http_server 2.2.22 · port 80
CVE-2017-15906 MEDIUM 5.3 openssh 6.0p1 · port 22
CVE-2022-28614 MEDIUM 5.3 http_server 2.2.22 · port 80
CVE-2022-37436 MEDIUM 5.3 http_server 2.2.22 · port 80
CVE-2026-33857 MEDIUM 5.3 http_server 2.2.22 · port 80
CVE-2026-34032 MEDIUM 5.3 http_server 2.2.22 · port 80
CVE-2013-1862 MEDIUM 5.1 http_server 2.2.22 · port 80
CVE-2013-5704 MEDIUM 5.0 http_server 2.2.22 · port 80
CVE-2013-6438 MEDIUM 5.0 http_server 2.2.22 · port 80
CVE-2014-0098 MEDIUM 5.0 http_server 2.2.22 · port 80
CVE-2014-0231 MEDIUM 5.0 http_server 2.2.22 · port 80
CVE-2015-0228 MEDIUM 5.0 http_server 2.2.22 · port 80
CVE-2015-3183 MEDIUM 5.0 http_server 2.2.22 · port 80
CVE-2026-33006 MEDIUM 4.8 http_server 2.2.22 · port 80
CVE-2008-0455 MEDIUM 4.3 http_server 2.2.22 · port 80
CVE-2012-3499 MEDIUM 4.3 http_server 2.2.22 · port 80
CVE-2012-4558 MEDIUM 4.3 http_server 2.2.22 · port 80
CVE-2013-1896 MEDIUM 4.3 http_server 2.2.22 · port 80
CVE-2014-0118 MEDIUM 4.3 http_server 2.2.22 · port 80
CVE-2015-5352 MEDIUM 4.3 openssh 6.0p1 · port 22
CVE-2016-8612 MEDIUM 4.3 http_server 2.2.22 · port 80
CVE-2014-2532 MEDIUM 4.2 openssh 6.0p1 · port 22
CVE-2012-2687 LOW 2.6 http_server 2.2.22 · port 80
Fixed by the distribution (1)

The distribution's security data says the package revision this service shows already has the fix for these CVEs, or that its build is not affected. They are not counted.

CVEs by severity: MEDIUM 1

CVESoftware
CVE-2012-0883 MEDIUM 6.9 http_server 2.2.22 · port 80
Only affects another platform (5)

These CVEs need a platform this host visibly does not run (for example a flaw of the Windows build on a Linux host). They are not counted.

CVEs by severity: CRITICAL 2 HIGH 2 MEDIUM 1

CVESoftware
CVE-2012-2376 HIGH 10.0 php 5.3.29 · port 80
CVE-2015-4642 CRITICAL 9.8 php 5.3.29 · port 80
CVE-2024-3566 CRITICAL 9.8 php 5.3.29 · port 80
CVE-2024-40898 HIGH 7.5 http_server 2.2.22 · port 80
CVE-2022-28330 MEDIUM 5.3 http_server 2.2.22 · port 80

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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