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PatchSiren cyber security CVE debrief

CVE-2026-50304 Microsoft CVE debrief

A stack-based buffer overflow vulnerability exists in Active Directory Federation Services, potentially allowing an unauthorized attacker to deny service over a network. The CVE record was published on 2026-07-14T18:17:28.220Z and was last modified on 2026-07-16T19:42:19.223Z. This vulnerability, tracked under CWE-121, has a CVSS score of 7.5 with a severity of HIGH. System administrators and security professionals should be aware of the potential impact on service availability and take necessary precautions. The vulnerability could allow an attacker to disrupt service, emphasizing the need for prompt patching or mitigation.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-16
Advisory published
2026-07-14
Advisory updated
2026-07-16

Who should care

System administrators and security professionals responsible for Active Directory Federation Services should be aware of this vulnerability and take necessary precautions. This includes reviewing and updating configurations, monitoring for unusual activity, and considering compensating controls if patching is not immediately feasible. The potential impact on service availability emphasizes the need for prompt action.

Technical summary

The vulnerability is a stack-based buffer overflow in Active Directory Federation Services, tracked under CWE-121. This could allow an unauthorized attacker to deny service over a network. The CVSS score is 7.5 with a severity of HIGH. The vulnerability affects various versions of Windows 10, Windows Server 2012, 2016, 2019, 2022, and 2025. Defensive measures should focus on patching or mitigating this vulnerability due to its high severity and potential impact on service availability.

Defensive priority

High priority should be given to patching or mitigating this vulnerability due to its high severity and potential impact on service availability.

Recommended defensive actions

  • Apply the vendor-provided patch for CVE-2026-50304
  • Review and update configurations for Active Directory Federation Services
  • Monitor for unusual activity or service disruptions
  • Consider implementing compensating controls if patching is not immediately feasible
  • Review relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD details provide information on the vulnerability. Microsoft has provided a patch and advisory for this issue. Affected products include various versions of Windows 10, Windows Server 2012, 2016, 2019, 2022, and 2025. The information available suggests that this vulnerability could have a significant impact on service availability if exploited. However, specific details about the exploitation are limited, and defenders should verify the affected scope and vendor guidance.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T18:17:28.220Z and has not been modified since then. The NVD entry is currently Analyzed.