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{"analysis": {"en": {"generated_at": "2026-04-20T16:04:19.400822+00:00", "value": {"mitigation_remediation": ["Apply the latest Microsoft security update for CVE-2025-62553 as outlined in the Microsoft Security Update Guide.", "Configure Excel and Office to run in Protected View for documents originating from untrusted locations and enforce strict macro security settings.", "As a temporary measure, avoid opening or executing macros in untrusted Excel files and consider disabling Add\u2011ins or features that might trigger the use\u2011after\u2011free flaw until a patch is available."], "summary": {"action": "Immediate Patch", "impact": "Local code execution"}, "threat_synthesis": {"affected_systems": "Microsoft 365 Apps for Enterprise, Microsoft Excel 2016, Microsoft Office 2019, Microsoft Office\u00a0LTSC\u00a02021 and 2024, Microsoft Office\u00a0LTSC for Mac\u00a02021 and 2024 are all impacted. Version details are not specified in the advisory, implying the vulnerability exists across the listed releases.", "description_and_impact": "A use\u2011after\u2011free bug in Microsoft Excel allows an attacker to execute code locally on the affected machine. The flaw can be triggered by opening a crafted Excel file, leading to arbitrary code running under the victim\u2019s user account. The weakness is classified as CWE\u2011416, which indicates that memory is accessed after it has already been freed, enabling the attacker to exploit unpredictable program state.", "risk_and_exploitability": "The CVSS score of 7.8 marks this as a high\u2011severity issue. The EPSS score of less than 1% suggests that, as of the last assessment, exploitation is unlikely but not impossible. The vulnerability is not currently listed in CISA\u2019s KEV catalog. Likely attack vectors involve a malicious Excel workbook or macro that a user opens locally, allowing the attacker to run arbitrary code on the machine."}}}}, "created": "2026-04-20T16:15:11.016509+00:00", "updated": "2026-04-20T16:15:11.016530+00:00", "vendors": []}