CVE-2026-61550
Published:September 18, 2026
Updated:October 09, 2026
Icinga 2 is an open source monitoring system. From 2.8 until 2.14.9, 2.15.4, and 2.16.2, certificate update JSON-RPC message handling does not validate that the sender is a trusted endpoint. An unauthenticated network attacker able to connect to TCP port 5665 can replace the node certificate and trusted CA certificate, impersonate a trusted node, and take control of the node. This issue is fixed in versions 2.14.9, 2.15.4, and 2.16.2.
Affected Packages
https://github.com/Icinga/icinga2.git (GITHUB):
Affected version(s) >=v2.15.0 <v2.15.4Fix Suggestion:
Update to version v2.15.4https://github.com/Icinga/icinga2.git (GITHUB):
Affected version(s) >=v2.16.0 <v2.16.2Fix Suggestion:
Update to version v2.16.2https://github.com/Icinga/icinga2.git (GITHUB):
Affected version(s) >=v2.8.0 <v2.14.9Fix Suggestion:
Update to version v2.14.9Related Resources (12)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Missing Authorization
EPSS
Base Score:
0.67