CVE-2026-26109

CWE-125 — Out-of-bounds Read5 documents5 sources
Severity
7.8HIGH
EPSS
0.1%
top 82.26%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
11
Microsoft Microsoft 365 Apps FOR EnterpriseMicrosoft Microsoft Excel 2016Microsoft Microsoft Office 2019+8 more
Timeline
PublishedMar 10

Description

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 2.5 | Impact: 5.9

Affected Packages12 packages

▶CVEListV5microsoft/microsoft_excel_201616.0.0.0 — 16.0.5543.1000
▶CVEListV5microsoft/office_online_server16.0.0.0 — 16.0.10417.20102
▶NVDmicrosoft/office_online_server< 16.0.10417.20102
▶CVEListV5microsoft/microsoft_office_201919.0.0 — https://aka.ms/OfficeSecurityReleases
▶CVEListV5microsoft/microsoft_office_ltsc_202116.0.1 — https://aka.ms/OfficeSecurityReleases

🔴Vulnerability Details

2
GHSA
GHSA-xfqf-gmc6-gw8v: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally↗2026-03-10
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CVEList
Microsoft Excel Remote Code Execution Vulnerability↗2026-03-10
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📋Vendor Advisories

1
Microsoft
Microsoft Excel Remote Code Execution Vulnerability↗2026-03-10
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🕵️Threat Intelligence

1
Wiz
CVE-2026-26109 Impact, Exploitability, and Mitigation Steps | Wiz↗
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