CVE-2026-26134

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:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
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 Integer Overflow Buffer Overflow Office

Description

Integer overflow or wraparound in Microsoft Office allows an authorized attacker to elevate privileges locally.

Analysis

Microsoft Office is vulnerable to an integer overflow that allows authenticated local users to escalate their privileges and gain full system control. An attacker with valid credentials can exploit this numeric calculation flaw to execute arbitrary code with elevated permissions. …

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Remediation

Within 24 hours: Inventory all Microsoft Office deployments and identify users with administrative or sensitive data access. Within 7 days: Implement application whitelisting and restrict Office macro execution to trusted sources; disable unnecessary Office features (DDE, ActiveX) via Group Policy. …

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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-2026-26134 vulnerability details – vuln.today
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