CVE-2026-108440

HIGH

MEDIUM Priority: 0.05 BB Relevance: 68/100

Published: 2026-10-15 Modified: 2026-10-28 First seen: 2026-10-29 Status: active

Network Low Complexity No Auth Conf. Impact Integ. Impact

AV: Network

AC: Low

PR: None

UI: Required

S: Unchanged

C: High

I: High

A: High

Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

Vendor	Product	Version
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 365 for Mac	1.0.0 < 16.114.26101123
Microsoft	Microsoft Office 365 for Mac	1.0.0 < 16.114.26101123
Microsoft	Microsoft Office LTSC 2021	16.0.1 < 16.0.14334.20974
Microsoft	Microsoft Office LTSC 2021	16.0.1 < 16.0.14334.20974
Microsoft	Microsoft Office LTSC 2024	16.0.0 < 16.0.17932.21056
Microsoft	Microsoft Office LTSC 2024	16.0.0 < 16.0.17932.21056
Microsoft	Microsoft Office LTSC for Mac 2021	16.0.1 < 16.114.26101123
Microsoft	Microsoft Office LTSC for Mac 2021	16.0.1 < 16.114.26101123
Microsoft	Microsoft Office LTSC for Mac 2024	16.0.0 < 16.114.26101123
Microsoft	Microsoft Office LTSC for Mac 2024	16.0.0 < 16.114.26101123
microsoft	365_apps	-
microsoft	365_apps	-
microsoft	microsoft_365	-
microsoft	office_2021	-
microsoft	office_2021	-
microsoft	office_2021	-
microsoft	office_2024	-
microsoft	office_2024	-
microsoft	office_2024	-

vendor-advisory patch

68 / 100

✓ Network accessible
✓ No authentication
✓ Low complexity

8.8 / 10.0 v3.1

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

0.62%

Raw Score 0.006180

Percentile 49.5%

Date 2026-10-29

2026-10-29

0.00618

2026-10-28

0.00618

mitre ref →