CVE-2026-70312: Powerpoint Information Disclosure Vulnerability
Improper input validation in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.
CSIRTS triage
- What
- Improper input validation in Microsoft Office PowerPoint causes an out-of-bounds read allowing disclosure of sensitive information.
- Who is affected
- Users of Microsoft Office PowerPoint who open untrusted files locally.
- Urgency
- Medium urgency; requires local user interaction and no active exploitation reported.
- Action
- Apply the latest security updates for Microsoft Office PowerPoint and advise users to avoid opening files from untrusted sources.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch Office PowerPoint
Get an email when a new Office PowerPoint advisory drops — max one per day, one-click unsubscribe.
Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70312
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.
- Low exploitation riskCVE-2026-703120.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-70312 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
Recent advisories for Powerpoint Information Disclosure
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.
- mediumCVE-2026-70325: Powerpoint Information Disclosure Vulnerabilitymsrc · 2026-08-11
- mediumCVE-2026-70320: Powerpoint Information Disclosure Vulnerabilitymsrc · 2026-08-11
- mediumCVE-2026-70322: Powerpoint Information Disclosure Vulnerabilitymsrc · 2026-08-11
- mediumCVE-2026-68809: Powerpoint Information Disclosure Vulnerabilitymsrc · 2026-08-11
- mediumCVE-2026-70316: Powerpoint Information Disclosure Vulnerabilitymsrc · 2026-08-11
More from Microsoft Security Response Center
- highCVE-2026-70130: Microsoft Office Remote Code Execution Vulnerability2026-08-11
- highCVE-2026-70354: .NET Core Remote Code Execution Vulnerability2026-08-11
- highCVE-2026-68792: Microsoft Office Elevation of Privilege Vulnerability2026-08-11
- highCVE-2026-66807: Microsoft Office Graphics Component Remote Code Execution Vulnerability2026-08-11
- highCVE-2026-64909: Microsoft Office Remote Code Execution Vulnerability2026-08-11