CVE-2026-62870

HIGH

MEDIUM Priority: 0.07 BB Relevance: 68/100

Published: 2026-08-03 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

Use after free in Microsoft Office Excel 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 Excel 2016	16.0.0.0 < 16.0.5561.1001
Microsoft	Microsoft Excel 2016	16.0.0.0 < 16.0.5561.1001
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 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	365_apps	-
microsoft	365_apps	-
microsoft	excel	2016
microsoft	excel	2016
microsoft	office_2019	-
microsoft	office_2019	-
microsoft	office_2021	-
microsoft	office_2021	-
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

0.82%

Raw Score 0.008190

Percentile 57.1%

Date 2026-10-28

mitre ref →