CVE-2026-80084

Microsoft Office Outlook Information Disclosure Vulnerability

CVE-2026-80084 is fixed in 2 products on 1 platform, first by KB5002898, released September 8, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

6.5

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0092

60th percentile

<p>Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to disclose information over a network.</p>

Where it's fixed

Product	Fix	Released
Microsoft
Microsoft Office 2016 (32-bit edition)	KB5002898	Sep 8, 2026
Microsoft Office 2016 (64-bit edition)	KB5002898	Sep 8, 2026

Details

Published
September 8, 2026
Weakness
Out-of-bounds Read
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80084

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