OSN

Host

81.91.84.71

Tags: End-of-life software

As of our latest check on 2026-05-24, 81.91.84.71 (Web4U s.r.o., AS39790, Czechia) had 2 open ports (22, 80) and 52 known CVEs.

Known CVEs on this host

2open ports
0names pointing here
52known CVEs
0known exploited

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

CVEs by severity: CRITICAL 5 HIGH 17 MEDIUM 24 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: 279 on a distribution build — the fix may be backported (php 5.4.4, 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: 4 only affect another platform (http_server 2.2.22, php 5.4.4). See them

Network
Web4U s.r.o. AS39790
Open ports
22, 80 · at our latest check, 2026-05-24
Location
Czechia CZ
Hostname
d147.server4u.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 (2)

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+deb7u1
Host key
ssh-rsa fc67ae4e28378aff…
Raw response 
SSH-2.0-OpenSSH_6.0p1 Debian-4+deb7u1
80/tcp HTTP Apache/2.2.22 (Debian) 22 CVEs first 2026-05-24 · last 2026-05-24
Status
302 Found
Server
Apache/2.2.22 (Debian)
Powered by
PHP/5.4.4-14+deb7u9
Raw response 
HTTP/1.1 302 Found
Date: Sun, 24 May 2026 02:32:30 GMT
Server: Apache/2.2.22 (Debian)
X-Powered-By: PHP/5.4.4-14+deb7u9
Location: http://vs178.server4u.cz
Content-Length: 0
Content-Type: text/html

Vulnerabilities

Distribution build — the fix may be backported (279)

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 68 HIGH 113 MEDIUM 94 LOW 4

CVESoftware
CVE-2021-40438 CRITICAL 9.0 known exploited http_server 2.2.22 · port 80
CVE-2012-2688 HIGH 10.0 php 5.4.4 · port 80
CVE-2015-0235 HIGH 10.0 php 5.4.4 · port 80
CVE-2014-9912 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2015-4116 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2015-4599 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2015-4600 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2015-4601 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2015-4602 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2015-4603 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2015-4643 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2015-5589 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2015-6834 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2015-6835 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2015-8835 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2015-8876 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-1908 CRITICAL 9.8 openssh 6.0p1 · port 22
CVE-2016-2554 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-3141 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-4537 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-4538 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-4539 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-4540 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-4541 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-4542 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-4543 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-5768 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-5769 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-5770 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-5771 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-5772 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-5773 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-6288 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-6290 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-6291 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-6294 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-6295 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-6296 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-7124 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-7126 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-7127 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-7129 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-7411 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-7413 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-7414 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-7417 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-9137 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-9138 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2016-9935 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2017-12933 CRITICAL 9.8 php 5.4.4 · port 80
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-2017-8923 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2017-9224 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2017-9225 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2017-9226 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2018-7584 CRITICAL 9.8 php 5.4.4 · 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-2016-1903 CRITICAL 9.1 php 5.4.4 · port 80
CVE-2016-5114 CRITICAL 9.1 php 5.4.4 · port 80
CVE-2017-11147 CRITICAL 9.1 php 5.4.4 · 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-2016-4342 HIGH 8.8 php 5.4.4 · port 80
CVE-2016-4343 HIGH 8.8 php 5.4.4 · port 80
CVE-2016-6297 HIGH 8.8 php 5.4.4 · port 80
CVE-2018-10549 HIGH 8.8 php 5.4.4 · 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-2016-5093 HIGH 8.6 php 5.4.4 · port 80
CVE-2016-5094 HIGH 8.6 php 5.4.4 · port 80
CVE-2016-5095 HIGH 8.6 php 5.4.4 · port 80
CVE-2016-5096 HIGH 8.6 php 5.4.4 · port 80
CVE-2025-58098 HIGH 8.3 http_server 2.2.22 · port 80
CVE-2016-3142 HIGH 8.2 php 5.4.4 · 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-2016-6174 HIGH 8.1 php 5.4.4 · port 80
CVE-2016-7412 HIGH 8.1 php 5.4.4 · 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-2016-5399 HIGH 7.8 php 5.4.4 · port 80
CVE-2016-6289 HIGH 7.8 php 5.4.4 · port 80
CVE-2017-11628 HIGH 7.8 php 5.4.4 · port 80
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-2013-1635 HIGH 7.5 php 5.4.4 · port 80
CVE-2013-3735 HIGH 7.5 php 5.4.4 · port 80
CVE-2013-6420 HIGH 7.5 php 5.4.4 · port 80
CVE-2014-0236 HIGH 7.5 php 5.4.4 · port 80
CVE-2014-3515 HIGH 7.5 php 5.4.4 · port 80
CVE-2014-3669 HIGH 7.5 php 5.4.4 · port 80
CVE-2014-8142 HIGH 7.5 php 5.4.4 · port 80
CVE-2014-9425 HIGH 7.5 php 5.4.4 · port 80
CVE-2014-9653 HIGH 7.5 php 5.4.4 · port 80
CVE-2014-9705 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-0231 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-0273 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-1351 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-2301 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-2331 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-2787 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-3307 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-3329 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-3414 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-3415 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-3416 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-4022 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-4025 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-4026 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-4147 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-4604 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-4605 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-4644 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-6833 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-6837 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-6838 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-8867 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-8873 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-8874 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-8877 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-8879 HIGH 7.5 php 5.4.4 · port 80
CVE-2015-8994 HIGH 7.5 php 5.4.4 · port 80
CVE-2016-10158 HIGH 7.5 php 5.4.4 · port 80
CVE-2016-10159 HIGH 7.5 php 5.4.4 · port 80
CVE-2016-10161 HIGH 7.5 php 5.4.4 · port 80
CVE-2016-10397 HIGH 7.5 php 5.4.4 · port 80
CVE-2016-10708 HIGH 7.5 openssh 6.0p1 · port 22
CVE-2016-10712 HIGH 7.5 php 5.4.4 · port 80
CVE-2016-4070 HIGH 7.5 php 5.4.4 · port 80
CVE-2016-6515 HIGH 7.5 openssh 6.0p1 · port 22
CVE-2016-7125 HIGH 7.5 php 5.4.4 · port 80
CVE-2016-7130 HIGH 7.5 php 5.4.4 · port 80
CVE-2016-7131 HIGH 7.5 php 5.4.4 · port 80
CVE-2016-7132 HIGH 7.5 php 5.4.4 · port 80
CVE-2016-7416 HIGH 7.5 php 5.4.4 · port 80
CVE-2016-7418 HIGH 7.5 php 5.4.4 · port 80
CVE-2016-7478 HIGH 7.5 php 5.4.4 · port 80
CVE-2016-8743 HIGH 7.5 http_server 2.2.22 · port 80
CVE-2016-9934 HIGH 7.5 php 5.4.4 · port 80
CVE-2017-11142 HIGH 7.5 php 5.4.4 · port 80
CVE-2017-11143 HIGH 7.5 php 5.4.4 · port 80
CVE-2017-11144 HIGH 7.5 php 5.4.4 · port 80
CVE-2017-11145 HIGH 7.5 php 5.4.4 · port 80
CVE-2017-16642 HIGH 7.5 php 5.4.4 · port 80
CVE-2017-7963 HIGH 7.5 php 5.4.4 · port 80
CVE-2017-9229 HIGH 7.5 php 5.4.4 · port 80
CVE-2017-9798 HIGH 7.5 http_server 2.2.22 · port 80
CVE-2018-10546 HIGH 7.5 php 5.4.4 · port 80
CVE-2018-10548 HIGH 7.5 php 5.4.4 · 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-2017-7272 HIGH 7.4 php 5.4.4 · 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-2014-9426 HIGH 7.3 php 5.4.4 · port 80
CVE-2015-5590 HIGH 7.3 php 5.4.4 · port 80
CVE-2015-6831 HIGH 7.3 php 5.4.4 · port 80
CVE-2015-6832 HIGH 7.3 php 5.4.4 · port 80
CVE-2015-6836 HIGH 7.3 php 5.4.4 · port 80
CVE-2015-8865 HIGH 7.3 php 5.4.4 · port 80
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-2014-0185 HIGH 7.2 php 5.4.4 · port 80
CVE-2016-3185 HIGH 7.1 php 5.4.4 · 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-2011-4718 MEDIUM 6.8 php 5.4.4 · port 80
CVE-2013-4113 MEDIUM 6.8 php 5.4.4 · port 80
CVE-2013-7327 MEDIUM 6.8 php 5.4.4 · port 80
CVE-2014-0226 MEDIUM 6.8 http_server 2.2.22 · port 80
CVE-2014-3597 MEDIUM 6.8 php 5.4.4 · port 80
CVE-2014-3670 MEDIUM 6.8 php 5.4.4 · port 80
CVE-2015-0232 MEDIUM 6.8 php 5.4.4 · port 80
CVE-2015-2305 MEDIUM 6.8 php 5.4.4 · port 80
CVE-2015-3330 MEDIUM 6.8 php 5.4.4 · port 80
CVE-2015-7803 MEDIUM 6.8 php 5.4.4 · port 80
CVE-2015-7804 MEDIUM 6.8 php 5.4.4 · port 80
CVE-2014-0207 MEDIUM 6.5 php 5.4.4 · port 80
CVE-2014-2653 MEDIUM 6.5 openssh 6.0p1 · port 22
CVE-2014-3478 MEDIUM 6.5 php 5.4.4 · port 80
CVE-2014-3480 MEDIUM 6.5 php 5.4.4 · port 80
CVE-2015-3411 MEDIUM 6.5 php 5.4.4 · port 80
CVE-2015-4598 MEDIUM 6.5 php 5.4.4 · port 80
CVE-2015-9253 MEDIUM 6.5 php 5.4.4 · port 80
CVE-2016-0777 MEDIUM 6.5 openssh 6.0p1 · port 22

Showing the first 200 of 279.

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 (4)

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 1 MEDIUM 1

CVESoftware
CVE-2015-4642 CRITICAL 9.8 php 5.4.4 · port 80
CVE-2024-3566 CRITICAL 9.8 php 5.4.4 · 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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