CVE-2026-21258
MEDIUM
2026-02-10
[email protected]
5.5
CVSS 3.1
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CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Lifecycle Timeline
2
Analysis Generated
Mar 12, 2026 - 22:02 vuln.today
CVE Published
Feb 10, 2026 - 18:16 nvd
MEDIUM 5.5
Description
Improper input validation in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Analysis
Information disclosure in Microsoft Excel allows local attackers with user interaction to read sensitive data through improper input validation in Office 365 Apps and Long Term Servicing Channel. An attacker must socially engineer a user into opening a specially crafted file to trigger the vulnerability. …
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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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Priority Score
28
Low
Medium
High
Critical
KEV: 0
EPSS: +0.0
CVSS: +28
POC: 0
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External POC / Exploit Code
Leaving vuln.today
Destination URL
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