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{"analysis": {"en": {"generated_at": "2026-04-20T15:49:38.124277+00:00", "value": {"mitigation_remediation": ["Apply the Microsoft cumulative update that contains the fix for CVE-2025-62564, updating all affected Office applications to the latest version.\n", "If an immediate update is not possible, restrict opening of unknown or untrusted Excel files by enabling the \"Block macros\" setting and using Office\u2019s built\u2011in sandboxing features.\n", "Monitor application logs for anomalous activity related to Excel or Office processes and investigate any attempts to open unexpected spreadsheets."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "Microsoft 365 Apps for Enterprise, Microsoft Excel 2016, Microsoft Office 2019, Microsoft Office LTSC 2021, Microsoft Office LTSC 2024, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC for Mac 2024 and Microsoft Office Online Server are explicitly impacted. Version information from CPE listings indicates that both 64\u2011bit and 32\u2011bit builds of these suites are affected, including the long\u2011term servicing channel releases for 2021 and 2024. Specific patch levels are not enumerated in the source, so any build lacking the latest cumulative update should be considered vulnerable.", "description_and_impact": "The vulnerability is an out\u2011of\u2011bounds read in Microsoft Excel that permits an attacker to execute arbitrary code on the victim\u2019s machine. This flaw arises from improper bounds checking of data within the application, leading to a potential code execution path. The impact is compromise of confidentiality, integrity and availability for the affected system, as a malicious workbook can trigger code under the user\u2019s context.", "risk_and_exploitability": "The CVSS score of 7.8 denotes high severity while the EPSS score of less than 1% suggests that exploitation is currently rare. The flaw is not listed in the CISA KEV catalog, indicating no confirmed widespread exploitation. Attackers would likely deliver a crafted workbook to the target; based on the description, the likely attack vector is via file download or email attachment, though the CVE entry does not specify network exposure. Given the high impact and low current exploitation probability, proactive patching is advised."}}}}, "created": "2026-04-20T16:00:10.653457+00:00", "updated": "2026-04-20T16:00:10.653467+00:00", "vendors": []}