PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-77492 Microsoft CVE debrief

An out-of-bounds read vulnerability exists in the Storage Port Driver, allowing an authorized local attacker to disclose information. This vulnerability has a CVSS score of 5.5 and a severity of MEDIUM. Affected products include various versions of Windows 10, Windows 11, and Windows Server. The vulnerability allows local information disclosure due to an out-of-bounds read in the Storage Port Driver. Defenders should prioritize patching affected systems, verify system configurations, and monitor logs for potential exploitation attempts. The CVE record and NVD vulnerability detail provide information on the vulnerability, its impact, and affected products. Vendor advisory and patch

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-28
Advisory published
2026-09-08
Advisory updated
2026-09-28

Who should care

System administrators and security teams responsible for Windows 10, Windows 11, and Windows Server systems should assess exposure and apply patches or mitigations as needed.

Why it matters

CVE-2026-77492 is a medium-severity vulnerability in the Storage Port Driver that allows local information disclosure. Defenders should prioritize patching affected systems, verify system configurations, and monitor logs for potential exploitation attempts.

  • Local information disclosure possible for authorized attackers
  • Patching required for affected Windows versions
  • Verification of system configurations and inventory needed
  • Monitoring system logs recommended for potential exploitation attempts

Technical summary

The vulnerability exists in the Storage Port Driver and allows an authorized local attacker to disclose information due to an out-of-bounds read. The CVSS score is 5.5, indicating a medium severity level. Affected products include Windows 10 versions 1607, 1809, 21H2, 22H2, 23H2, 24H2, 25H2, 26H1; Windows 11 versions 23H2, 24H2, 25H2, 26H1; and Windows Server versions 2012, 2012 R2, 2016, 2019, 2022, 2025.

Defensive priority

Medium-priority patching and verification recommended for affected systems

Recommended defensive actions

  • Apply patches for affected Windows 10, Windows 11, and Windows Server versions
  • Verify system configurations and inventory for affected products
  • Monitor system logs for potential exploitation attempts

Evidence notes

The CVE record and NVD vulnerability detail provide information on the vulnerability, its impact, and affected products. Vendor advisory and patch information are also available.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-77492 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-77492

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

  • CVE-2026-77492 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-77492

    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.