OSN

Network

O2 Czech Republic, a.s.

AS29321registered in Czechia (CZ)hosts in 1 country

As of 2026-10-11, O2 Czech Republic, a.s. (AS29321, registered in Czechia) had 691 hosts seen in 1 country; 9 of them with known CVEs (50 distinct, 1 known to be exploited). It announces 5 IPv4 prefixes and 1 IPv6 prefix (15 360 IPv4 addresses, 7 343rd by address space).

Known CVEs in this network

691hosts seen
9hosts with known CVEs
50distinct CVEs
1known exploited

CVEs by severity: CRITICAL 2 HIGH 14 MEDIUM 18 LOW 16

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.

Not counted: 1 host with CVEs only on distribution builds whose fix may be backported.

Counted 2026-10-11 04:20 UTC

Organisation
CentroNet, a.s.
Network type
Access network (cable / DSL / ISP) · peering policy Open
Website
http://www.centronet.cz/
Registry
RIPE NCC · Czechia CZ · allocated 2003-07-31
Announced prefixes
5 IPv4 · 1 IPv6 See them
IPv4 address space
15 360 addresses · 7 343rd of 87 285 networks by size
Rank by exposure
9 375th by hosts with known CVEs Ranking

Routing

Most common CVEs in this network

CVEHosts
CVE-2026-106585 MEDIUM 6.5 5
CVE-2026-106552 MEDIUM 4.2 5
CVE-2026-106582 LOW 3.7 5
CVE-2026-106587 LOW 3.3 5
CVE-2026-106583 LOW 2.5 5
CVE-2026-106584 LOW 2.5 5
CVE-2026-106586 LOW 2.5 5
CVE-2026-106553 LOW 2.2 5
CVE-2026-106555 LOW 2.2 5
CVE-2023-44487 HIGH 7.5 known exploited 4
CVE-2026-60002 HIGH 7.7 4
CVE-2026-60000 HIGH 7.5 4
CVE-2026-59998 MEDIUM 6.5 4
CVE-2026-60001 MEDIUM 6.5 4
CVE-2026-59999 MEDIUM 5.9 4
CVE-2026-59995 MEDIUM 5.4 4
CVE-2026-59996 MEDIUM 5.4 4
CVE-2026-59997 MEDIUM 5.4 4
CVE-2025-23419 MEDIUM 5.3 4
CVE-2026-73282 MEDIUM 4.8 4
CVE-2026-73281 LOW 3.5 4
CVE-2026-73283 LOW 2.5 4
CVE-2026-35385 HIGH 8.1 3
CVE-2026-35414 HIGH 8.1 3
CVE-2022-41741 HIGH 7.8 3
CVE-2021-23017 HIGH 7.7 3
CVE-2021-3618 HIGH 7.4 3
CVE-2022-41742 HIGH 7.1 3
CVE-2026-35387 MEDIUM 6.5 3
CVE-2019-20372 MEDIUM 5.3 3
CVE-2026-106588 LOW 3.1 3
CVE-2026-106589 LOW 2.9 3
CVE-2026-35388 LOW 2.5 3
CVE-2023-38408 CRITICAL 9.8 2
CVE-2025-26465 MEDIUM 6.8 2
CVE-2023-51385 MEDIUM 6.5 2
CVE-2023-48795 MEDIUM 5.9 2
CVE-2025-32728 LOW 3.8 2
CVE-2025-61984 LOW 3.6 2
CVE-2025-61985 LOW 3.6 2
CVE-2023-28531 CRITICAL 9.8 1
CVE-2024-6387 HIGH 8.1 1
CVE-2020-12062 HIGH 7.5 1
CVE-2020-15778 HIGH 7.4 1
CVE-2021-28041 HIGH 7.1 1
CVE-2021-41617 HIGH 7.0 1
CVE-2020-14145 MEDIUM 5.9 1
CVE-2023-51384 MEDIUM 5.5 1
CVE-2016-20012 MEDIUM 5.3 1
CVE-2021-36368 LOW 3.7 1

Most exposed hosts

IPExploitedCVEs
217.195.175.131 1 7 CVEs
217.195.175.132 1 7 CVEs
217.195.175.137 1 7 CVEs
217.195.169.189 1 2 CVEs
109.239.76.224 0 40 CVEs
217.195.175.70 0 34 CVEs
217.195.161.106 0 24 CVEs
109.239.79.182 0 22 CVEs
80.243.110.226 0 11 CVEs

Known exploited first, then by the number of CVEs.

Where its hosts are

CountryHostsWith CVEs
Czechia CZ 691 9
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