CVE-2026-26109

CVE Enrichment

CVSS: 7.8 HIGH
EPSS: 0.47%
EPSS Percentile: 40.61%
CISA KEV: Not listed

Description

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

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 11-Mar-2026 01:18
Last Modified: 17-Jun-2026 17:25
EPSS Date: 2026-11-08
CWE: CWE-125

CVSS Vector


            CVSS:3.1                            AV:L /
                            AC:L /
                            PR:L /
                            UI:N /
                            S:U /
                            C:H /
                            I:H /
                            A:H

CNA Products / Version Status

Microsoft · Microsoft 365 Apps for Enterprise Source: CNA · [email protected]
Default status: unknown

16.0.1 ≤ version < https://aka.ms/OfficeSecurityReleases — affected (custom)

Platforms: 32-bit Systems, x64-based Systems
Microsoft · Microsoft Excel 2016 Source: CNA · [email protected]
Default status: unknown

16.0.0.0 ≤ version < 16.0.5543.1000 — affected (custom)

Platforms: 32-bit Systems, x64-based Systems
Microsoft · Microsoft Office 2019 Source: CNA · [email protected]
Default status: unknown

19.0.0 ≤ version < https://aka.ms/OfficeSecurityReleases — affected (custom)

Platforms: 32-bit Systems, x64-based Systems
Microsoft · Microsoft Office LTSC 2021 Source: CNA · [email protected]
Default status: unknown

16.0.1 ≤ version < https://aka.ms/OfficeSecurityReleases — affected (custom)

Platforms: 32-bit Systems, x64-based Systems
Microsoft · Microsoft Office LTSC 2024 Source: CNA · [email protected]
Default status: unknown

16.0.0 ≤ version < https://aka.ms/OfficeSecurityReleases — affected (custom)

Platforms: 32-bit Systems, x64-based Systems
Microsoft · Microsoft Office LTSC for Mac 2021 Source: CNA · [email protected]
Default status: unknown

16.0.1 ≤ version < 16.107.26030819 — affected (custom)
Microsoft · Microsoft Office LTSC for Mac 2024 Source: CNA · [email protected]
Default status: unknown

16.0.0 ≤ version < 16.107.26030819 — affected (custom)
Microsoft · Office Online Server Source: CNA · [email protected]
Default status: unknown

16.0.0.0 ≤ version < 16.0.10417.20102 — affected (custom)

Affected Products / Versions

microsoft / 365_apps Source: NVD CPE · affected
Version / affected range: -
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
microsoft / 365_apps Source: NVD CPE · affected
Version / affected range: -
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
microsoft / excel Source: NVD CPE · affected
Version / affected range: 2016
cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:*
microsoft / excel Source: NVD CPE · affected
Version / affected range: 2016
cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x86:*
microsoft / office Source: NVD CPE · affected
Version / affected range: 2019
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*
microsoft / office Source: NVD CPE · affected
Version / affected range: 2019
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2021
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x64:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2021
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x86:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2021
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2024
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x64:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2024
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x86:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2024
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:macos:*:*
microsoft / office_online_server Source: NVD CPE · affected
Version / affected range: * · before (exclusive) 16.0.10417.20102
cpe:2.3:a:microsoft:office_online_server:*:*:*:*:*:*:*:*

References

[email protected]

Last enrichment sync: 09-Nov-2026 14:52
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

Another Office-related issue, CVE-2026-26109, is an “Important” vulnerability in Excel caused by an out-of-bounds read. Microsoft’s March 2026 Patch Tuesday Fixes 79 Vulnerabilities, Including Two Disclosed Zero-Days

CVE (5)

People (1)

Vendors (1)

Products (8)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.