CVE-2026-80084

MEDIUM CVSS 3.1: 6.5 EPSS 0.92%
Updated Sep 10, 2026
Microsoft
Parameter Value
CVSS 6.5 (MEDIUM)
Affected Versions 16.0.0 — 16.0.5569.1002
Fixed In 16.0.10417.20207
Type CWE-125 (Out-of-bounds Read)
Vendor Microsoft
Public PoC No

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

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption

CVSS Vector v3.1

Weakness Type (CWE)

Vulnerable Products 15

Configuration From (including) Up to (excluding)
Microsoft Office_2019
cpe:2.3:a:microsoft:office_2019:*:*:*:*:*:*:*:*
19.0.0 16.0.10417.20207
Microsoft 365_Apps
cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*
16.0.1 16.0.20326.20138
Microsoft Office_2021
cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*
16.0.1 16.0.14334.20906
Microsoft Office_2024
cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*
16.0.0 16.0.17932.20976
Microsoft Office_2016
cpe:2.3:a:microsoft:office_2016:*:*:*:*:*:*:x86:*
16.0.0 16.0.5569.1002
Microsoft 365_Apps
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
— —
Microsoft 365_Apps
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
— —
Microsoft Office_2016
cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x64:*
— —
Microsoft Office_2016
cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x86:*
— —
Microsoft Office_2019
cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x64:*
— —
Microsoft Office_2019
cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x86:*
— —
Microsoft Office_2021
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:*
— —
Microsoft Office_2021
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*
— —
Microsoft Office_2024
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:*
— —
Microsoft Office_2024
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*
— —