CVE-2026-26112

HIGH
2026-03-10 [email protected]
7.8
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:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Mar 10, 2026 - 18:18 nvd
HIGH 7.8

Tags

Microsoft Authentication Bypass Office Online Server Excel Office Office Long Term Servicing Channel 365 Apps

Description

Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Analysis

Microsoft Excel and Office products are vulnerable to local code execution through unsafe pointer dereferencing, requiring user interaction to trigger. An attacker with local access can exploit this flaw to achieve arbitrary code execution with full system privileges. …

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Remediation

Within 24 hours: Identify and inventory all Excel users; disable Excel macros via Group Policy and communicate restrictions to users. Within 7 days: Implement network segmentation to limit lateral movement if Excel is compromised; deploy advanced email filtering to block suspicious attachments; conduct user awareness training on phishing and file handling. …

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Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +39
POC: 0

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CVE-2026-26112 vulnerability details – vuln.today
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