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PatchSiren cyber security CVE debrief

CVE-2026-62784 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-11T17:18:31.917Z and has not been modified since then. The NVD entry is currently Analyzed. CVE-2026-62784 is a heap-based buffer overflow vulnerability in the Microsoft Local Security Authority Server (lsasrv). An authorized attacker could exploit this vulnerability to execute code over a network. The vulnerability has a CVSS score of 8.8 and is classified as HIGH severity. Affected products include various versions of Windows 10, Windows 11, and Windows Server. System administrators and security teams responsible for Windows systems, particularly those running vulnerable versions of Windows 10, Windows 11, and Windows Server, should be aware of this vulnerability and take steps to mitigate it. Review and apply Microsoft's vendor advisory for CVE-2026-62784. Inventory and assess systems for potential exposure, particularly those running vulnerable Windows versions. Implement compensating controls such as network segmentation and access restrictions. Monitor for suspicious activity related to lsasrv. Consider applying patches or updates as they become available.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-11
Original CVE updated
2026-08-16
Advisory published
2026-08-11
Advisory updated
2026-08-16

Who should care

System administrators and security teams responsible for Windows systems, particularly those running vulnerable versions of Windows 10, Windows 11, and Windows Server, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

CVE-2026-62784 is a heap-based buffer overflow vulnerability in the Microsoft Local Security Authority Server (lsasrv). An authorized attacker could exploit this vulnerability to execute code over a network. The vulnerability has a CVSS score of 8.8 and is classified as HIGH severity. Affected products include various versions of Windows 10, Windows 11, and Windows Server.

Defensive priority

Authorized attackers could exploit this vulnerability to execute code over a network, indicating a high level of risk.

Recommended defensive actions

  • Review and apply Microsoft's vendor advisory for CVE-2026-62784
  • Inventory and assess systems for potential exposure, particularly those running vulnerable Windows versions
  • Implement compensating controls such as network segmentation and access restrictions
  • Monitor for suspicious activity related to lsasrv
  • Consider applying patches or updates as they become available

Evidence notes

The CVE and NVD records provide details on the vulnerability, including its CVSS score of 8.8 and vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Microsoft has provided a vendor advisory for mitigation.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-62784 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-62784

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

  • CVE-2026-62784 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-62784

    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.