CVE-2026-120495: Arbitrary file write and code execution via crafted Synthetic Monitoring agent data
Checkmk GmbH · Checkmk
Vendor fix available · Affected: Checkmk GmbH · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 40% of scored CVEs
DescriptionCVE.org
Path traversal in the Synthetic Monitoring "Robotmk" test service of Checkmk <2.5.0p19, <2.4.0p40, and 2.3.0 (EOL) allows an attacker who controls the agent output of a monitored host's check output for a host to inject a crafted robot output to define the contents and location for the generated HTML log, leading to code execution as the site user.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Checkmk GmbH · Checkmkfrom 2.5.0 before 2.5.0p19; from 2.4.0 before 2.4.0p40; 2.3.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Checkmk GmbH
- Published
- November 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-120495 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.