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CVE-2026-70313: Microsoft PowerPoint Remote Code Execution Vulnerability

highCVSS 7.8CVE-2026-70313
Improper input validation in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.

CSIRTS triage

vendor: Microsoftproduct: PowerPointInformation disclosure
What
Improper input validation in PowerPoint allows information disclosure locally.
Who is affected
Unauthorized attackers with local access to PowerPoint deployments.
Urgency
High severity (CVSS 7.8) but not currently exploited; remediation should be prioritized.
Action
Apply Microsoft security patches for CVE-2026-70313 when available.

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 7.8
Published
2026-08-11
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70313

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-2026-70313coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Microsoft PowerPoint Remote

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