CVE-2026-58651

HIGH

MEDIUM Priority: 0.04 BB Relevance: 41/100

Published: 2026-08-11 Modified: 2026-10-28 First seen: 2026-10-29 Status: active

Low Complexity No Auth Conf. Impact Integ. Impact

AV: Local

AC: Low

PR: None

UI: Required

S: Unchanged

C: High

I: High

A: High

Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.

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 < 16.112.26081010
Microsoft	Microsoft Office 365 for Mac	1.0.0 < 16.112.26081010
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 < 16.112.26081010
Microsoft	Microsoft Office LTSC for Mac 2021	16.0.1 < 16.112.26081010
Microsoft	Microsoft Office LTSC for Mac 2024	16.0.0 < 16.112.26081010
Microsoft	Microsoft Office LTSC for Mac 2024	16.0.0 < 16.112.26081010
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

41 / 100

✓ No authentication
✓ Low complexity

7.8 / 10.0 v3.1

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

0.47%

Raw Score 0.004660

Percentile 40.3%

Date 2026-10-29

2026-10-29

0.00466

2026-10-28

0.00466

mitre ref →