Is CVE-2018-9127 actively exploited?

No active exploitation of CVE-2018-9127 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-9127 be exploited remotely?

Yes. CVE-2018-9127 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-9127?

CVE-2018-9127 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2018-9127

CRITICAL

CVE-2018-9127

CWE-295Published: April 2, 2018· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Botan 2.2.0 - 2.4.0 (fixed in 2.5.0) improperly handled wildcard certificates and could accept certain certificates as valid for hostnames when, under RFC 6125 rules, they should not match. This only affects certificates issued to the same domain as the host, so to impersonate a host one must already have a wildcard certificate matching other hosts in the same domain. For example, b*.example.com would match some hostnames that do not begin with a 'b' character.

NVD Source

Technical Analysis

CVE-2018-9127 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.