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CVE-2026-45648: Windows Active Directory Domain Services Remote Code Execution Vulnerability

highCVSS 8.8CVE-2026-45648
Stack-based buffer overflow in Active Directory Domain Services allows an authorized attacker to execute code over a network.

CSIRTS triage

vendor: Microsoftproduct: Active Directory Domain ServicesRemote code execution
What
A stack-based buffer overflow allows an authorized attacker to execute code over a network.
Who is affected
Authorized users of Active Directory Domain Services.
Urgency
Remediation is urgent due to the high severity and potential for remote code execution.
Action
Apply the latest security patch for Active Directory Domain Services.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 8.8
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45648

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-2026-45648coverage & exploitation statusNVD · CVE.org

Recent advisories for Windows Active Directory

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.

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