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{"analysis": {"en": {"generated_at": "2026-04-16T18:09:28.586352+00:00", "value": {"mitigation_remediation": ["Install the latest Microsoft Office security updates for all affected products as soon as they are available.", "Ensure that Microsoft Office auto\u2011update is enabled and enforced across all devices to reduce the window of exposure.", "When opening documents from external sources, use Office Application Guard or run Office in a sandboxed container to isolate execution of potentially malicious code."], "summary": {"action": "Immediate Patch", "impact": "Local Code Execution"}, "threat_synthesis": {"affected_systems": "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, and their corresponding long\u2011term servicing channel releases for Windows and macOS. These versions are impacted until the vendor releases remediation updates.", "description_and_impact": "An attacker can exploit a use\u2011after\u2011free bug in Microsoft Office (CWE-416) that allows the execution of arbitrary code on the device where a malicious file is opened. The flaw arises when Office incorrectly reuses a freed memory pointer, creating an opportunity for injected code to run with the privileges of the current user. This vulnerability directly threatens data confidentiality, integrity, and availability by enabling local privilege escalation or denial of service if a user opens a crafted Office document.", "risk_and_exploitability": "The CVSS score of 8.4 reflects a high\u2011severity local function impact. EPSS indicates a very low likelihood of exploitation at the time of assessment, and the vulnerability has not been listed in CISA\u2019s Known Exploited Vulnerabilities catalog. Based on the description, the attack vector is inferred to be the opening of a malicious Office file by an authorized user; an attacker would need local access to the target machine or convince the user to execute the file. The risk is therefore significant for environments where untrusted documents are common but may be mitigated by leveraging corporate update and isolation policies."}}}}, "created": "2026-04-16T18:15:43.298316+00:00", "updated": "2026-04-16T18:15:43.298327+00:00", "vendors": []}