Question 1

What is CVE-2026-56155?

Accepted Answer

CVE-2026-56155 is a high-severity software vulnerability with a CVSS score of 7.8.

Question 2

Is CVE-2026-56155 being actively exploited?

Accepted Answer

Yes — CVE-2026-56155 is in CISA's Known Exploited Vulnerabilities (KEV) catalog, so it is confirmed exploited in the wild. Patch affected products as a priority.

Question 3

What products does CVE-2026-56155 affect?

Accepted Answer

Tracked products affected include Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2025. Check the version you run to see whether it is affected.

Question 4

How do I fix CVE-2026-56155?

Accepted Answer

This vulnerability is being actively exploited in the wild — patch affected products urgently. Upgrade affected products to a fixed version.

CVE-2026-56155

Summary

Affected products we track (4)

Recommendation

Additional information