CVE-2026-70320

Local information disclosure via undisclosed input validation

Published Aug 11, 2026 · Updated Aug 25, 2026

Improper input validation in Microsoft Office PowerPoint allows local users to disclose information from affected Office releases. Microsoft has disclosed only that PowerPoint mishandles untrusted input; no public advisory, CVE record, or release note identifies the affected parser, field, or operation. Reachability requires local access and user interaction with attacker-supplied presentation content, and the published impact is limited to information disclosure rather than code execution or service interruption.

CVSS severityUnavailable
Unscored
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Microsoft Office PowerPoint allows local users to disclose information from affected Office releases. Microsoft has disclosed only that PowerPoint mishandles untrusted input; no public advisory, CVE record, or release note identifies the affected parser, field, or operation. Reachability requires local access and user interaction with attacker-supplied presentation content, and the published impact is limited to information disclosure rather than code execution or service interruption.

The record

CVE
CVE-2026-70320
Published
Aug 11, 2026
Updated
Aug 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5MicrosoftCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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