- Server
- SSH-2.0-OpenSSH_7.9p1 Debian-10+deb10u2
- Host key
- ssh-ed25519 9d23a8fa7c56a4eb…
Raw response
SSH-2.0-OpenSSH_7.9p1 Debian-10+deb10u2
Host
81.91.92.201
Tags: Expired certificate
As of our latest check on 2026-05-24, 81.91.92.201 (Web4U s.r.o., AS39790, Czechia) had 2 open ports (22, 443) and 19 known CVEs.
Known CVEs on this host
2open ports
0names pointing here
19known CVEs
0known exploited
Open ports and CVEs as of our latest check of this host, 2026-05-24.
CVEs by severity: HIGH 4 MEDIUM 9 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: 13 on a distribution build — the fix may be backported (openssh 7.9p1). See them
- Network
- Web4U s.r.o. AS39790
- Open ports
- 22, 443 · at our latest check, 2026-05-24
- Location
- Czechia CZ
- Hostname
- vs1281.server4u.cz · reverse DNS, checked 2026-10-04
- Route
- 81.91.88.0/21 · announced by Web4U s.r.o. AS39790 RPKI valid
- Organisation
- Web4U s.r.o. · Content / hosting
- Registry network
- WEB4U-NET-CUST-92 · 81.91.92.0 - 81.91.92.255 · RIPE
- Abuse contact
- [email protected] · for WEB4U-NET-CUST-92
- First seen
- 2026-05-24 02:32 UTC
- Last seen alive
- 2026-05-24 02:32 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)
443/tcp
TLS
first 2026-05-24 · last 2026-05-24
- TLS
- TLSv1.2
- Certificate for
- aplikace.viom.cz
- Issued by
- R3
- Valid
- 2022-10-25 → 2023-01-23
Raw response
HTTP/1.1 400 Bad Request Date: Sun, 24 May 2026 02:32:13 GMT Server: Apache 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
Distribution build — the fix may be backported (13)
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 3 MEDIUM 8 LOW 1
| CVE | Software |
|---|---|
| CVE-2023-38408 CRITICAL 9.8 | openssh 7.9p1 · port 22 |
| CVE-2019-16905 HIGH 7.8 | openssh 7.9p1 · port 22 |
| CVE-2020-15778 HIGH 7.4 | openssh 7.9p1 · port 22 |
| CVE-2021-41617 HIGH 7.0 | openssh 7.9p1 · port 22 |
| CVE-2019-6109 MEDIUM 6.8 | openssh 7.9p1 · port 22 |
| CVE-2019-6110 MEDIUM 6.8 | openssh 7.9p1 · port 22 |
| CVE-2023-51385 MEDIUM 6.5 | openssh 7.9p1 · port 22 |
| CVE-2019-6111 MEDIUM 5.9 | openssh 7.9p1 · port 22 |
| CVE-2020-14145 MEDIUM 5.9 | openssh 7.9p1 · port 22 |
| CVE-2023-48795 MEDIUM 5.9 | openssh 7.9p1 · port 22 |
| CVE-2016-20012 MEDIUM 5.3 | openssh 7.9p1 · port 22 |
| CVE-2018-20685 MEDIUM 5.3 | openssh 7.9p1 · port 22 |
| CVE-2021-36368 LOW 3.7 | openssh 7.9p1 · 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.