CVE-2026-124228ImportantRCENetwork

Microsoft Office Outlook Remote Code Execution Vulnerability

MSRC advisory NVD CVE.org

Assessment

Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Office Outlook allows an authorized attacker to execute code over a network.

Severity: Important
CVSS base score: 8.8
Impact: Remote Code Execution
Exploitation detected: No known exploitation (MSRC assessment)
Exploitability: Exploitation Less Likely
Publicly disclosed: No (MSRC assessment)
EPSS · 30-day forecast: No EPSS score collected
Customer action: Required: follow the MSRC remediation guidance

More details

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Public detection template: No Nuclei template is listed in the current collected catalog
Component: Microsoft Office Outlook
Weakness: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Issued by: Microsoft
Published: 10 Nov 2026 · November 2026
Last revised: 10 Nov 2026

CVSS 3.1 base metricsRed raises the risk · green lowers it

Attack vector: NetworkAV:N
Attack complexity: LowAC:L
Privileges required: LowPR:L
User interaction: NoneUI:N
Scope: UnchangedS:U
Confidentiality: HighC:H
Integrity: HighI:H
Availability: HighA:H

Updates that fix it

0 KBs

No KB listed

No KB update is listed in the collected MSRC record. Check the MSRC advisory for product releases and other remedies.

Affected products

Microsoft Office

6 affected products

Page history

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Explore global source statements, affected packages and advisory history for CVE-2026-124228. The catalog has a separate collection scope from Microsoft release records.

cve-program · CVE-2026-124228

Published

Microsoft 365 Apps for Enterprise

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "Microsoft",
                    "product": "Microsoft 365 Apps for Enterprise",
                    "platforms": [
                        "32-bit Systems",
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "16.0.1",
                            "lessThan": "https://aka.ms/OfficeSecurityReleases",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Microsoft Office LTSC 2021

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "Microsoft",
                    "product": "Microsoft Office LTSC 2021",
                    "platforms": [
                        "32-bit Systems",
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "16.0.1",
                            "lessThan": "16.0.14334.21048",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Microsoft Office LTSC 2024

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "Microsoft",
                    "product": "Microsoft Office LTSC 2024",
                    "platforms": [
                        "32-bit Systems",
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "16.0.0",
                            "lessThan": "16.0.17932.21140",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON