Low 2.3Published Dec 18, 2025

CVE-2025-65000Exposure of SSH Private Keys in Remote Alert Handlers (Linux) Rule

Updated under an hour ago (Oct 27, 2026, 3:10 PM ET)

Does this affect you?

It affects Checkmk GmbH Checkmk. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Checkmk GmbH Checkmk

Exploited in the last 30 days

SSH private keys of the "Remote alert handlers (Linux)" rule were exposed in the rule page's HTML source in Checkmk <= 2.4.0p18 and all versions of Checkmk 2.3.0. This potentially allowed unauthorized triggering of predefined alert handlers on hosts where the handler was deployed.

CVSS: 2.3 LOW (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:L/SA:L
Weakness (CWE): CWE-212
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Checkmk
NVD analysis: Analyzed
Record last updated: Dec 18, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Checkmk GmbH Checkmk checkmk:checkmk (from the name)	from 2.4.0 before 2.4.0p18; 2.3.0	CNA record
checkmk checkmk checkmk:checkmk	2.2.0; 2.3.0; 2.3.0; 2.3.0; 2.3.0; 2.3.0; 2.3.0; 2.3.0; and 66 more ranges	NVD

References

References

https://checkmk.com/werk/19030	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.