CVE-2025-61908Network attack vector

Authenticated daemon crash via null reference dereference

Published Oct 16, 2025 · Updated Oct 16, 2025

Denial of service in affected Icinga 2 releases allows remote authenticated users to crash the daemon via a crafted API filter expression. The expression evaluator dereferences an invalid reference, including null, without checking it first, causing a segmentation fault. Any API account that can access an endpoint accepting filter expressions, including /v1/actions or /v1/objects, can stop the monitoring service.

CVSS severity7.1
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Icinga 2 releases allows remote authenticated users to crash the daemon via a crafted API filter expression. The expression evaluator dereferences an invalid reference, including null, without checking it first, causing a segmentation fault. Any API account that can access an endpoint accepting filter expressions, including /v1/actions or /v1/objects, can stop the monitoring service.

The record

CVE
CVE-2025-61908
Published
Oct 16, 2025
Updated
Oct 16, 2025
Vendor
Icinga
Product
Icinga 2
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>=2.10.0, < 2.13.13
  2. Affected versionversion=>=2.14.0, < 2.14.7
  3. Affected versionversion=>=2.15.0, < 2.15.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Icinga · Icinga 2version=>=2.10.0, < 2.13.13; version=>=2.14.0, < 2.14.7; version=>=2.15.0, < 2.15.1

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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