CVE-2026-26113

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"value": "[16.0.0,16.107.26030819)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Microsoft Office LTSC for Mac 2024", "source": "cna", "vendor": "Microsoft"}, "product": "office_macos_2024", "vendor": "microsoft"}, {"configurations": [{"platform": ["32-bit_systems", "x64-based_systems"], "status": "affected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "sharepoint_server", "vendor": "microsoft"}, {"configurations": [{"platform": ["x64-based_systems"], "status": "affected", "versions": {"scheme": "generic", "value": "[16.0.0,16.0.5543.1000)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Microsoft SharePoint Enterprise Server 2016", "source": "cna", "vendor": "Microsoft"}, "product": "sharepoint_server_2016", "vendor": "microsoft"}, {"configurations": [{"platform": ["x64-based_systems"], "status": "affected", "versions": {"scheme": "generic", "value": "[16.0.0,16.0.10417.20102)"}}], "enrichment": {"confidence": 86.0, "confidence_source": "matching", "scores": [{"score": 86.0, "source": "matching"}]}, "original": {"product": "Microsoft SharePoint Server 2019", "source": "cna", "vendor": "Microsoft"}, "product": "sharepoint_server_2019", "vendor": "microsoft"}, {"configurations": [{"platform": ["x64-based_systems"], "status": "affected", "versions": {"scheme": "generic", "value": "[16.0.0,16.0.19725.20076)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Microsoft SharePoint Server Subscription Edition", "source": "cna", "vendor": "Microsoft"}, "product": "sharepoint_server_subscription_edition", "vendor": "microsoft"}], "analysis": {"en": {"generated_at": "2026-03-17T00:36:05.792981+00:00", "value": {"mitigation_remediation": ["Verify whether your Microsoft Office or SharePoint installation is affected by reviewing the Microsoft Security Update Guide for CVE\u20112026\u201126113.", "Download and install the official patch or update for the affected Office or SharePoint version as soon as it is available.", "After applying the update, confirm that the vulnerability has been addressed by checking the application version or using the Microsoft update status page.", "If an urgent patch cannot be applied, isolate the affected system from the network or restrict access to potentially malicious Office files (e.g., block .docx or .xlsx attachments in email or disable opening of Office files from untrusted sources)."], "summary": {"action": "Patch Now", "impact": "Local Code Execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the following Microsoft products: Microsoft 365 Apps for Enterprise; Microsoft Office 2016, 2019, Office LTSC 2021, Office LTSC 2024, Office LTSC for Mac 2021, Office LTSC for Mac 2024; Microsoft SharePoint Enterprise Server\u202f2016; Microsoft SharePoint Server\u00a02016, 2019, and Subscription Edition. The CNA did not publish explicit version ranges, so any instance of the listed products is considered vulnerable unless an update has already been applied.", "description_and_impact": "Untrusted pointer dereference in Microsoft Office allows an attacker who can supply an untrusted file to execute arbitrary code in the context of the logged\u2011in user. The flaw arises when the application processes data that contains an untrusted pointer, resulting in an undefined pointer dereference. This leads to local code execution that can compromise confidentiality, integrity, and availability by permitting the attacker to read, modify or delete files, install malware, or otherwise take over the affected system. The vulnerability is identified as CWE\u2011822, a flaw involving pointer dereference of untrusted data.", "risk_and_exploitability": "The CVSS score of 8.4 indicates high severity, while the EPSS score of <1% suggests a low probability of exploitation at present. The vulnerability is not listed in the CISA KEV catalog. Based on the description, the attack vector is inferred to require a local user to open a malicious Office document or to otherwise trigger the erroneous pointer dereference. No network\u2011based exploitation path is described, so the threat is confined to local users exposed to crafted files."}}}}, "created": "2026-03-11T11:45:49.535252+00:00", "updated": "2026-03-20T14:34:23.249891+00:00", "vendors": ["microsoft", "microsoft$PRODUCT$365_apps", "microsoft$PRODUCT$microsoft_365_apps_for_enterprise", "microsoft$PRODUCT$office_2016", "microsoft$PRODUCT$office_2019", "microsoft$PRODUCT$office_2021", "microsoft$PRODUCT$office_2024", "microsoft$PRODUCT$office_macos_2021", "microsoft$PRODUCT$office_macos_2024", "microsoft$PRODUCT$sharepoint_server", "microsoft$PRODUCT$sharepoint_server_2016", "microsoft$PRODUCT$sharepoint_server_2019", "microsoft$PRODUCT$sharepoint_server_subscription_edition"]}