CVE-2026-21261
MEDIUMCVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Lifecycle Timeline
2Description
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Analysis
Information disclosure in Microsoft Office Excel and related products results from an out-of-bounds read vulnerability that requires local access and user interaction to exploit. An attacker can leverage this flaw to read sensitive data from memory on an affected system. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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External POC / Exploit Code
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