Dashboard / CVE-2026-55027

CVE-2026-55027

MEDIUM
MEDIUM Priority: 0.03 BB Relevance: 36/100
Published: 2026-07-14 Modified: 2026-10-28 First seen: 2026-10-29 Status: active

Attack Surface

Low Complexity No Auth Conf. Impact

CVSS Vector Breakdown

AV: Local
AC: Low
PR: None
UI: Required
S: Unchanged
C: High
I: None
A: None

Description

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

Weakness Classification (1)

Affected Software (38)

VendorProductVersion
Microsoft Microsoft 365 Apps for Enterprise 16.0.1 < https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft 365 Apps for Enterprise 16.0.1 < https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Office 2016 16.0.0 < 16.0.5561.1000
Microsoft Microsoft Office 2016 16.0.0 < 16.0.5561.1000
Microsoft Microsoft Office 2019 19.0.0 < https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Office 2019 19.0.0 < https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Office 365 for Mac 1.0.0 < 16.111.26071215
Microsoft Microsoft Office 365 for Mac 1.0.0 < 16.111.26071215
Microsoft Microsoft Office LTSC 2021 16.0.1 < https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Office LTSC 2021 16.0.1 < https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Office LTSC 2024 16.0.0 < https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Office LTSC 2024 16.0.0 < https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Office LTSC for Mac 2021 16.0.1 < 16.111.26071215
Microsoft Microsoft Office LTSC for Mac 2021 16.0.1 < 16.111.26071215
Microsoft Microsoft Office LTSC for Mac 2024 16.0.0 < 16.111.26071215
Microsoft Microsoft Office LTSC for Mac 2024 16.0.0 < 16.111.26071215
Microsoft Microsoft SharePoint Enterprise Server 2016 16.0.0 < 16.0.5561.1001
Microsoft Microsoft SharePoint Enterprise Server 2016 16.0.0 < 16.0.5561.1001
Microsoft Microsoft SharePoint Server 2019 16.0.0 < 16.0.10417.20175
Microsoft Microsoft SharePoint Server 2019 16.0.0 < 16.0.10417.20175
Microsoft Microsoft SharePoint Server Subscription Edition 16.0.0 < 16.0.19725.20434
Microsoft Microsoft SharePoint Server Subscription Edition 16.0.0 < 16.0.19725.20434
microsoft 365_apps -
microsoft 365_apps -
microsoft microsoft_365 -
microsoft office_2016 -
microsoft office_2016 -
microsoft office_2019 -
microsoft office_2019 -
microsoft office_2021 -
Showing 30 of 38 entries

References & Advisories (1)

Bug Bounty Relevance

36 / 100
✓ No authentication
✓ Low complexity

CVSS Score

5.5 / 10.0 v3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

EPSS — Exploitation Probability

0.60%
Raw Score 0.005950
Percentile 48.3%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00595
2026-10-28
0.00595

Intelligence Sources

mitre ref →

External Links