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Out-of-Bounds Read in Microsoft Office Excel Discloses Information to Local Attackers

Last refreshed2026-09-26

Status: UPDATED  |  Advisory ID: CVE-2026-32188

Key Details

CVECVE-2026-32188
CVSS Score / Version7.1 (High) / CVSS v3.1
Updated2026-09-24
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
CVSS Proseattack vector is local; attack complexity is low; privileges required is none; user interaction is required; scope is unchanged; confidentiality impact is high; integrity impact is none; availability impact is high.
Affected productsMicrosoft Office, Microsoft Office Long Term Servicing Channel, and Microsoft Office Online Server
Classified asCWE-125 (Out-of-bounds Read)
Exploitation prediction (EPSS)0.53% probability of exploitation in the next 30 days (42% percentile) -- FIRST.org's EPSS model.

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
MicrosoftOffice
MicrosoftOffice Long Term Servicing Channel
MicrosoftOffice Online Server
SubsystemsGeneral OT
SectorsMultiple

What to Know

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

What to Do

Monitor Microsoft's web page for any future patch releases. See vendor advisory link below.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-32188
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-32188
Vendor advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32188