CVE-2026-97814 – Windows Text Shaping Remote Code Execution Vulnerability

A critical Remote Code Execution (RCE) vulnerability has been identified in Windows Text Shaping, affecting multiple versions of Microsoft Windows, Windows Server, and Visual Studio. The vulnerability, caused by a heap-based buffer overflow, allows an unauthenticated attacker to execute malicious code remotely by sending a specially crafted network packet to an affected service. With a CVSS score of 9.8, low attack complexity, and no requirement for authentication or user interaction, this vulnerability presents a serious security risk. Successful exploitation could compromise sensitive information, allow unauthorized system modifications, or disrupt business operations. Microsoft has released security updates to address this vulnerability.

CVSS SCORE: 9.8

SEVERITY: Critical

Threat

This vulnerability poses a significant threat because attackers can potentially compromise affected Windows systems remotely without needing valid credentials or assistance from users.

The attack can be launched over a network and requires relatively little complexity, making vulnerable systems attractive targets.

Successful exploitation could allow attackers to:

• Execute malicious code on affected systems.
• Access or steal confidential business information.
• Modify or delete important files and system configurations.
• Disrupt critical applications and business services.
• Potentially establish a foothold for further attacks within an organization’s network.

The combination of network-based exploitation, low attack complexity, and no authentication requirements makes this vulnerability particularly dangerous.

Exploits

Microsoft has classified this vulnerability as Exploitation Less Likely.

At the time of publication:

• Actively Exploited: No.
• Publicly Disclosed: No.
• Public Exploit Code: Exploit code maturity is classified as Unproven.
• Zero-Day Exploitation: No known exploitation is reported.
• Proof-of-Concept (PoC): The existence of publicly available PoC exploit code is not confirmed.

Although exploitation has not been reported, the vulnerability’s technical characteristics make it a serious concern.

An attacker does not require authentication or user interaction to attempt exploitation.

Technical Summary

CVE-2026-97814 is a critical heap-based buffer overflow vulnerability (CWE-122) affecting the Windows Text Shaping component.

The vulnerability occurs when an affected service processes specially crafted network packets, potentially causing memory corruption.

A heap-based buffer overflow happens when a program writes more information into a memory buffer than the allocated space can safely hold.

This memory corruption can potentially allow an attacker to manipulate program execution and run unauthorized code.

An attacker could exploit this vulnerability by sending a specially crafted packet to an affected service over the network.

The vulnerability has several important characteristics:

• Attack Vector: Network (AV:N).
• Attack Complexity: Low (AC:L).
• Privileges Required: None (PR:N).
• User Interaction: None (UI:N).
• Scope: Unchanged (S:U).
• Confidentiality Impact: High.
• Integrity Impact: High.
• Availability Impact: High.

Successful exploitation could allow remote code execution on the targeted system.

This could compromise the confidentiality, integrity, and availability of affected Windows environments.

Microsoft has released an official security fix to address the vulnerability.

Exploitability

The vulnerability affects multiple Microsoft products, including:

• Windows 10: Versions 1607, 1809, 21H2, and 22H2.
• Windows 11: Versions 23H2, 24H2, 25H2, and 26H1.
• Windows Server: 2012, 2012 R2, 2016, 2019, 2022, and 2025, including Server Core installations.
• Microsoft Visual Studio: 2026 version 18.10.

Affected Windows architectures include 32-bit, x64, and ARM64, depending on the operating system version.

Attack Requirements: No authentication, no privileges, and no user interaction.

Attackers could exploit the vulnerability remotely by sending specially crafted network packets to an affected service.

Microsoft currently assesses exploitation as less likely.

Business Impact

This vulnerability presents a serious security concern for organizations operating affected Windows systems, particularly those supporting critical business applications and services.

Because exploitation requires neither authentication nor user interaction, attackers could potentially compromise vulnerable systems without relying on phishing emails or stolen credentials.

Potential business consequences include:

• Data Breaches: Attackers could gain unauthorized access to confidential business information, customer records, and sensitive corporate data.
• Operational Disruption: Compromised systems could experience service interruptions, potentially affecting business productivity and customer operations.
• System Compromise: Successful remote code execution could allow attackers to run malicious programs or modify critical system configurations.
• Ransomware Exposure: Attackers could potentially use compromised systems as an entry point for ransomware or other malicious activity.
• Financial and Reputational Damage: Security incidents could result in recovery costs, operational downtime, and loss of customer confidence.

Organizations running affected Windows Server versions may face additional risks because these systems often support essential business infrastructure.

A single vulnerable server could become the entry point for a much larger security incident.

Workaround

Microsoft has not identified any official mitigations or workarounds for this vulnerability.

The recommended action is to install the applicable Microsoft security updates.

If immediate patching is not possible:

• Restrict unnecessary network access to affected systems.
• Limit exposure of vulnerable services to untrusted networks.
• Monitor affected systems for suspicious network activity.
• Prioritize patch deployment on critical and externally accessible systems.

These are general risk-reduction measures and are not confirmed fixes for this vulnerability.

A system restart is required after installing the applicable security update.

Urgency

Critical Priority – Deploy Security Updates as Soon as Possible.

CVE-2026-97814 carries a CVSS score of 9.8, placing it among the most severe vulnerability classifications.

Although Microsoft currently considers exploitation less likely and has not reported active exploitation, the vulnerability presents significant risks because of its technical characteristics.

Attackers could potentially execute malicious code remotely without authentication, special privileges, or user interaction.

Organizations should prioritize patch deployment across affected Windows workstations, Windows Servers, and Visual Studio installations.

Special attention should be given to critical production servers, systems supporting sensitive business operations, and devices accessible from untrusted networks.

The absence of known attacks does not eliminate the risk. A vulnerability that requires no password and no user interaction deserves immediate attention before attackers find a way to exploit it.