How severe is CVE-2025-61909?

CVE-2025-61909 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-61909 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-61909?

CVE-2025-61909 primarily affects Icinga. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-61909?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-61909 have an EU (EUVD) identifier?

Yes. CVE-2025-61909 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34791.

When was CVE-2025-61909 published?

CVE-2025-61909 was published on 2025-10-16 and last updated on 2026-06-17.

CVE-2025-61909

CVE-2025-61909 is a medium-severity vulnerability in Icinga with a CVSS 3.x base score of 4.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-250.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
CVSS v4: 4.0
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-34791
Weakness: CWE-250
Affected product: Icinga
Published: 2025-10-16
Last modified: 2026-06-17

Description

Icinga 2 is an open source monitoring system. From 2.10.0 to before 2.15.1, 2.14.7, and 2.13.13, the safe-reload script (also used during systemctl reload icinga2) and logrotate configuration shipped with Icinga 2 read the PID of the main Icinga 2 process from a PID file writable by the daemon user, but send the signal as the root user. This can allow the Icinga user to send signals to processes it would otherwise not permitted to. A fix is included in the following Icinga 2 versions: 2.15.1, 2.14.7, and 2.13.13.

Frequently asked questions

What is CVE-2025-61909?: Icinga 2 is an open source monitoring system. From 2.10.0 to before 2.15.1, 2.14.7, and 2.13.13, the safe-reload script (also used during systemctl reload icinga2) and logrotate configuration shipped with Icinga 2 read the PID of the main Icinga 2 process from a PID file writable by the daemon user, but send the signal as the root user. This can allow the Icinga user to send signals to processes it would otherwise not permitted to. A fix is included in the following Icinga 2 versions: 2.15.1, 2.14.7, and 2.13.13.
How severe is CVE-2025-61909?: CVE-2025-61909 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-61909 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-61909?: CVE-2025-61909 primarily affects Icinga. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-61909?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-61909 have an EU (EUVD) identifier?: Yes. CVE-2025-61909 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34791.
When was CVE-2025-61909 published?: CVE-2025-61909 was published on 2025-10-16 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:icinga:icinga:*:*:*:*:*:*:*:*
cpe:2.3:a:icinga:icinga:2.15.0:*:*:*:*:*:*:*

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