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CVE-2026-26107 is a use-after-free vulnerability in Microsoft Office Excel. The provided content states that the flaw allows an unauthorized attacker to execute code locally. Based on the vulnerability class, exploitation would involve Excel accessing memory after it has been freed, potentially enabling attacker-controlled memory corruption and code execution in the context of the user running Excel. The content places this issue among a cluster of Office-related vulnerabilities affecting Excel and related Microsoft Office products during Microsoft’s March 2026 patch cycle.
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Cross-references every affected SKU, including bundled OEM variants.
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