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PatchSiren cyber security CVE debrief

CVE-2026-88140 Microsoft CVE debrief

A Windows Key Storage Provider Information Disclosure Vulnerability exists, allowing an authorized local attacker to disclose information due to an out-of-bounds read. Multiple Windows versions and server releases are affected. The vulnerability is caused by an out-of-bounds read in the Windows Key Storage Provider. An authorized local attacker can exploit this vulnerability to disclose information. The CVE and NVD records provide details on the vulnerability. Microsoft has released a patch for this issue. Defenders should apply patches, assess exposure, and verify system configurations to mitigate potential risks.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-13
Original CVE updated
2026-10-13
Advisory published
2026-10-13
Advisory updated
2026-10-13

Who should care

Defenders and system administrators responsible for Windows systems, especially those managing Windows 10 and 11, and Windows Server environments, should assess exposure and apply patches.

Why it matters

CVE-2026-88140 is a medium-severity vulnerability allowing local information disclosure in Windows Key Storage Provider. Defenders should apply patches, assess exposure, and verify system configurations to mitigate potential risks.

  • Local information disclosure possible
  • Patch application required for affected systems
  • System configuration verification necessary

Technical summary

The Windows Key Storage Provider Information Disclosure Vulnerability (CVE-2026-88140) is caused by an out-of-bounds read in the Windows Key Storage Provider. An authorized local attacker can exploit this vulnerability to disclose information. Multiple Windows 10 and 11 versions, as well as Windows Server releases, are affected.

Defensive priority

Apply patches immediately for Windows Key Storage Provider Information Disclosure Vulnerability CVE-2026-88140, assess exposure, verify system configurations.

Recommended defensive actions

  • Apply patches for CVE-2026-88140 on affected Windows versions
  • Assess exposure and verify system configurations
  • Monitor system logs for potential exploitation attempts

Evidence notes

The CVE and NVD records provide details on the vulnerability. Microsoft has released a patch for this issue. The vulnerability is caused by an out-of-bounds read in the Windows Key Storage Provider. An authorized local attacker can exploit this vulnerability to disclose information. Multiple Windows 10 and 11 versions, as well as Windows Server releases, are affected. Defenders should apply patches, assess exposure, and verify system configurations to mitigate potential risks. The CVE-

Sources and references

Verified primary and authoritative sources

  • CVE-2026-88140 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-88140

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

  • CVE-2026-88140 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-88140

    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.