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CVE-2026-69519: Azure Stack HCI Information Disclosure Vulnerability

highCVSS 8.6CVE-2026-69519
Observable response discrepancy in Azure Stack HCI allows an unauthorized attacker to disclose information over a network.

CSIRTS triage

vendor: Microsoftproduct: Azure Stack HCIInformation disclosure
What
Observable response discrepancy allows unauthorized attackers to disclose sensitive information over a network.
Who is affected
All Azure Stack HCI deployments are affected.
Urgency
High severity (CVSS 8.6) information disclosure with network exposure requires prompt patching.
Action
Apply Microsoft security update for Azure Stack HCI response handling.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 8.6
Published
2026-08-11
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69519

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-69519coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Azure Stack HCI

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center