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NVD Vulnerability Details :
CVE-2026-44820
Modified
More InfoOfficial Page
Source-secure@microsoft.com
View Known Exploited Vulnerability (KEV) details
Published At-09 Jun, 2026 | 17:17
Updated At-23 Jul, 2026 | 08:10

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

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.17.8HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
N/A
Type: Secondary
Version: 3.1
Base score: 7.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches
Microsoft Corporation
microsoft
>>365_apps>>-
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
Microsoft Corporation
microsoft
>>365_apps>>-
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
Microsoft Corporation
microsoft
>>excel>>2016
cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:*
Microsoft Corporation
microsoft
>>excel>>2016
cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x86:*
Microsoft Corporation
microsoft
>>microsoft_365>>-
cpe:2.3:a:microsoft:microsoft_365:-:*:*:*:*:macos:*:*
Microsoft Corporation
microsoft
>>office_2019>>-
cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x64:*
Microsoft Corporation
microsoft
>>office_2019>>-
cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x86:*
Microsoft Corporation
microsoft
>>office_2021>>-
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:*
Microsoft Corporation
microsoft
>>office_2021>>-
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*
Microsoft Corporation
microsoft
>>office_2021>>-
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:*
Microsoft Corporation
microsoft
>>office_2024>>-
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:*
Microsoft Corporation
microsoft
>>office_2024>>-
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*
Microsoft Corporation
microsoft
>>office_2024>>-
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:*
Microsoft Corporation
microsoft
>>office_online_server>>-
cpe:2.3:a:microsoft:office_online_server:-:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-125Secondarysecure@microsoft.com
CWE ID: CWE-125
Type: Secondary
Source: secure@microsoft.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44820secure@microsoft.com
Vendor Advisory
Hyperlink: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44820
Source: secure@microsoft.com
Resource:
Vendor Advisory
Change History
0Changes found
Details not found