Host
As of our latest check on 2026-05-24, 81.91.92.129 (Web4U s.r.o., AS39790, Czechia) had 2 open ports (22, 80) and 6 known CVEs, 1 known to be exploited.
Open ports and CVEs as of our latest check of this host, 2026-05-24.
CVEs by severity: HIGH 5 MEDIUM 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: 26 on a distribution build — the fix may be backported (openssh 8.4p1). See them
Earlier software versions of this host and the CVEs they had are kept as its history. See the history
Not a Tor relay, not a VPN or privacy relay address, and not on a current public blocklist.
SSH-2.0-OpenSSH_8.4p1 Debian-5+deb11u7
HTTP/1.1 403 Forbidden
Server: nginx/1.18.0
Date: Sun, 24 May 2026 02:32:13 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Connection: keep-alive
Content-Encoding: gzip
b0
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0
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 6 MEDIUM 12 LOW 7
| CVE | Software |
|---|---|
| CVE-2023-38408 CRITICAL 9.8 | openssh 8.4p1 · port 22 |
| CVE-2026-35385 HIGH 8.1 | openssh 8.4p1 · port 22 |
| CVE-2026-35414 HIGH 8.1 | openssh 8.4p1 · port 22 |
| CVE-2026-60002 HIGH 7.7 | openssh 8.4p1 · port 22 |
| CVE-2026-60000 HIGH 7.5 | openssh 8.4p1 · port 22 |
| CVE-2021-28041 HIGH 7.1 | openssh 8.4p1 · port 22 |
| CVE-2021-41617 HIGH 7.0 | openssh 8.4p1 · port 22 |
| CVE-2025-26465 MEDIUM 6.8 | openssh 8.4p1 · port 22 |
| CVE-2023-51385 MEDIUM 6.5 | openssh 8.4p1 · port 22 |
| CVE-2026-35387 MEDIUM 6.5 | openssh 8.4p1 · port 22 |
| CVE-2026-59998 MEDIUM 6.5 | openssh 8.4p1 · port 22 |
| CVE-2026-60001 MEDIUM 6.5 | openssh 8.4p1 · port 22 |
| CVE-2023-48795 MEDIUM 5.9 | openssh 8.4p1 · port 22 |
| CVE-2026-59999 MEDIUM 5.9 | openssh 8.4p1 · port 22 |
| CVE-2026-59995 MEDIUM 5.4 | openssh 8.4p1 · port 22 |
| CVE-2026-59996 MEDIUM 5.4 | openssh 8.4p1 · port 22 |
| CVE-2026-59997 MEDIUM 5.4 | openssh 8.4p1 · port 22 |
| CVE-2016-20012 MEDIUM 5.3 | openssh 8.4p1 · port 22 |
| CVE-2026-73282 MEDIUM 4.8 | openssh 8.4p1 · port 22 |
| CVE-2025-32728 LOW 3.8 | openssh 8.4p1 · port 22 |
| CVE-2021-36368 LOW 3.7 | openssh 8.4p1 · port 22 |
| CVE-2025-61984 LOW 3.6 | openssh 8.4p1 · port 22 |
| CVE-2025-61985 LOW 3.6 | openssh 8.4p1 · port 22 |
| CVE-2026-73281 LOW 3.5 | openssh 8.4p1 · port 22 |
| CVE-2026-35388 LOW 2.5 | openssh 8.4p1 · port 22 |
| CVE-2026-73283 LOW 2.5 | openssh 8.4p1 · port 22 |
Software versions this host showed earlier, when we saw each, why it no longer applies, and the CVEs matched on it then. None of them is 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.