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CVE-2026-45648 Microsoft CVE debrief

CVE-2026-45648 is a stack-based buffer overflow vulnerability in Active Directory Domain Services. This HIGH severity vulnerability has a CVSS score of 8.8 and allows an authorized attacker to execute code over a network. The vulnerability was published on [cvePublishedAt] and last modified on [cveModifiedAt].

Vendor
Microsoft
Product
Windows Server 2022
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-11
Advisory published
2026-06-09
Advisory updated
2026-06-11

Who should care

Administrators and security teams responsible for Active Directory Domain Services should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by a stack-based buffer overflow in Active Directory Domain Services. This allows an authorized attacker to execute code over a network. The Common Vulnerability Scoring System (CVSS) score is 8.8, indicating a HIGH severity vulnerability.

Defensive priority

HIGH

Recommended defensive actions

  • Apply patches or updates provided by the vendor (see [ref-4]).
  • Review and update access controls to limit access to Active Directory Domain Services.
  • Monitor network activity for suspicious behavior.

Evidence notes

The CVE record [cve-org] and NVD detail [nvd] provide additional information about the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45648 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45648

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-45648 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45648

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.