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RCE in Windows Kerberos Key Distribution Center (KDC)

IdentifiersCVE-2026-47288CWE-190· Integer Overflow or Wraparound

CVE-2026-47288 is a critical remote code execution vulnerability in the Windows Kerberos Key Distribution Center (KDC). The flaw is caused by an integer overflow or wraparound in the Windows Kerberos implementation. According to the provided advisory context, an authenticated attacker on an adjacent network can send specially crafted authentication-related data to a domain controller and trigger the vulnerable condition, potentially leading to code execution in the Kerberos service context on the target domain controller. The issue affects the Windows Kerberos/KDC component used by domain controllers to process Kerberos authentication traffic.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can result in remote code execution against a domain controller via the Windows Kerberos component. The provided Microsoft advisory context also indicates the attacker may be able to disrupt the Kerberos service or obtain higher privileges on the domain controller. Because the vulnerable component is the KDC on a domain controller, compromise could have severe downstream effects on identity infrastructure and domain security.

Remediation

Patch, then assume compromise.

Apply Microsoft's June 2026 security update for Windows Kerberos / domain controllers that addresses CVE-2026-47288. Prioritize patching domain controllers and other systems hosting the Windows Kerberos KDC role in accordance with Microsoft's June 2026 guidance.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
Microsoft CorporationWindowsoperating_system
Microsoft CorporationWindows Server 2012operating_system
Microsoft CorporationWindows Server 2016operating_system
Microsoft CorporationWindows Server 2019operating_system
Microsoft CorporationWindows Server 2022operating_system
Microsoft CorporationWindows Server 2025operating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

What this page doesn’t show

The version that knows your environment.

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity

Community discussion across Reddit, Mastodon, and other social sources.