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Privacy Statement Third-Party Cookies Accept Reject Manage cookies MSRC  Customer Guidance  Security Update Guide  Vulnerabilities  CVE-2026-42832 Microsoft Office Spoofing Vulnerability New On this page  CVE-2026-42832  Subscribe RSS PowerShell  API  CSAF Security Vulnerability Released: May 12, 2026 Assigning CNA Microsoft CVE.org link CVE-2026-42832  Impact Spoofing Max Severity Important Weakness CWE-284: Improper Access Control CVSS Source Microsoft Vector String CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C Metrics CVSS:3.1 7.7 / 6.7  Base score metrics: 7.7 / Temporal score metrics: 6.7  Expand all  Collapse all Metric Value   Base score metrics(8) Attack Vector Local Attack Complexity Low Privileges Required None User Interaction None Scope Unchanged Confidentiality High Integrity High Availability None   Temporal score metrics(3) Exploit Code Maturity Unproven Remediation Level Official Fix Report Confidence Confirmed Please see Common Vulnerability Scoring System for more information on the definition of these metrics. Executive Summary Improper access control in Microsoft Office allows an unauthorized attacker to perform spoofing locally. Exploitability The following table provides an exploitability assessment for this vulnerability at the time of original publication. Publicly disclosed No Exploited No Exploitability assessment Exploitation Unlikely FAQ Is the Preview Pane an attack vector for this vulnerability? No, the Preview Pane is not an attack vector. Acknowledgements Yanir Tsarimi 𝕏 @ yanir_ Microsoft recognizes the efforts of those in the security community who help us protect customers through coordinated vulnerability disclosure. See Acknowledgements for more information. Security Updates To determine the support lifecycle for your software, see the Microsoft Support Lifecycle. Release date Descending  Edit columns  Download  Filters  Product Family  Max Severity  Impact  Platform   Clear Release date  Product Platform Impact Max Severity Article Download Build Number Assigning CNA Customer Action Required Title: Release date, Content: May 12, 2026 Microsoft Office LTSC for Mac 2024 - Spoofing Important Title: Knowledge Base Articles for Microsoft Office LTSC for Mac 2024, Content:, 1 link Release Notes  Title: Download Security Update for Microsoft Office LTSC for Mac 2024, Content:, 1 link Security Update  Title: Build numbers, Content: 16.109.26051019 Title: Assigning CNA, Content: Microsoft Title: Customer action required, Content: Required Title: Release date, Content: May 12, 2026 Microsoft Office LTSC for Mac 2021 - Spoofing Important Title: Knowledge Base Articles for Microsoft Office LTSC for Mac 2021, Content:, 1 link Release Notes  Title: Download Security Update for Microsoft Office LTSC for Mac 2021, Content:, 1 link Security Update  Title: Build numbers, Content: 16.109.26051019 Title: Assigning CNA, Content: Microsoft Title: Customer action required, Content: Required Title: Release date, Content: May 12, 2026 Microsoft Excel for Android - Spoofing Important Title: Knowledge Base Articles for Microsoft Excel for Android, Content:, 1 link Release Notes  Title: Download Security Update for Microsoft Excel for Android, Content:, 1 link Security Update  Title: Build numbers, Content: 16.0.19822.20190 Title: Assigning CNA, Content: Microsoft Title: Customer action required, Content: Required Title: Release date, Content: May 12, 2026 Microsoft Word for Android - Spoofing Important Title: Knowledge Base Articles for Microsoft Word for Android, Content:, 1 link Release Notes  Title: Download Security Update for Microsoft Word for Android, Content:, 1 link Security Update  Title: Build numbers, Content: 16.0.19822.20190 Title: Assigning CNA, Content: Microsoft Title: Customer action required, Content: Required All results loaded Loaded all 4 rows Disclaimer The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. Revisions version revisionDate description 1.0 May 12, 2026 Information published.  How satisfied are you with the MSRC Security Update Guide? Rating  Broken  Bad  Below average  Average  Great!  Your Privacy Choices Consumer Health Privacy