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CVE-2026-49159: Microsoft Graph Information Disclosure Vulnerability

mediumCVSS 6.5CVE-2026-49159
Exposure of sensitive information to an unauthorized actor in Microsoft Graph allows an authorized attacker to disclose information over a network.

CSIRTS triage

vendor: Microsoftproduct: Microsoft GraphInformation disclosure
What
Exposure of sensitive information allows an authorized attacker to disclose information over a network.
Who is affected
Deployments of Microsoft Graph are affected.
Urgency
Remediation is important due to the medium severity of the information disclosure risk.
Action
Apply the latest security updates for Microsoft Graph.

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
medium — CVSS 6.5
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49159

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-2026-49159coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Microsoft Graph Information

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.

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