Vulnerabilities
Microsoft Excel Information Disclosure Vulnerability (CVE‑2026‑81391) – Office for Mac Update Required
Microsoft released a patch for CVE‑2026‑81391, an information‑disclosure flaw in Excel on macOS. Only Office for Mac users are affected; other Office editions do not need action. Install the update immediately to eliminate the risk.
What Happened
A flaw in Microsoft Excel on macOS allows an attacker to read sensitive data from memory when a malicious workbook is opened. The vulnerability is identified as CVE‑2026‑81391.
Impact
Only Microsoft Office for Mac installations are vulnerable. Other Office products (Windows, iOS, Android) are not affected.
What to Do
Office for Mac users should download and install the latest update from Microsoft. No action is required for other Office editions.
Related vulnerabilities
Microsoft Office for Mac Excel Information Disclosure CVE-2026-88184 – Immediate Update Required
Microsoft released a patch for an information‑disclosure flaw in Excel on Mac (CVE‑2026‑88184). Mac users of Office must install the update to prevent data leakage. Other Office platforms are unaffected.
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Microsoft Office for Mac CVE-2026-80089: Information Disclosure – Update Required
A recent vulnerability (CVE-2026-80089) allows information disclosure in Microsoft Office for Mac. Users of the affected Mac version must install the security update immediately. Other Office products are not impacted.
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Microsoft Office for Mac Vulnerability CVE-2026-80082 – Information Disclosure
Microsoft Office for Mac is affected by CVE-2026-80082, an information‑disclosure flaw that can expose user data. The issue is fixed in the latest Office update; administrators should deploy the patch immediately. Non‑Mac Office users are not impacted.
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Microsoft Office for Mac: CVE-2026-80090 Information Disclosure Vulnerability Fixed
Microsoft released patches for Office for Mac to fix CVE-2026-80090, an information‑disclosure flaw in Word. Mac users of affected Office versions must update immediately; other Office platforms are not impacted.
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