CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

CVE-2026-56168: Windows SMB Server Denial of Service Vulnerability

mediumCVSS 6.5CVE-2026-56168
Null pointer dereference in Windows SMB Server allows an authorized attacker to deny service over a network.

CSIRTS triage

vendor: Microsoftproduct: Windows SMB ServerDenial of service
What
Null pointer dereference in Windows SMB Server allows an authorized attacker to deny service over a network.
Who is affected
Users of Windows SMB Server.
Urgency
Remediation is important due to the medium severity and potential for denial of service.
Action
Apply the latest security patch for Windows SMB Server.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch Windows SMB Server

Get an email when a new Windows SMB Server advisory drops — max one per day, one-click unsubscribe.

Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 6.5
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56168

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-56168coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Windows SMB Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center