---

📌 Overview

CVE-2026-97798 is a Windows Error Reporting (WER) Service vulnerability involving improper neutralization of argument delimiters in a command, commonly known as Argument Injection.

The vulnerability could allow an authorized local attacker to elevate privileges on an affected Windows system.

This repository documents the vulnerability, its technical classification, potential security impact, affected Windows versions, defensive investigation, and remediation recommendations.

🎯 Vulnerability Information

Attribute	Details
CVE ID	CVE-2026-97798
Vendor	Microsoft
Component	Windows Error Reporting
Vulnerability Type	Argument Injection
CWE	CWE-88
Attack Vector	Local
Attack Complexity	Low
Privileges Required	Low
User Interaction	None
Scope	Unchanged
CVSS Version	3.1
CVSS Score	7.8
Severity	HIGH
Publication Date	October 13, 2026

🚨 Security Impact

Successful exploitation could potentially result in:

• Privilege Escalation: An attacker could gain elevated permissions.
• Confidentiality Impact: Unauthorized access to sensitive information.
• Integrity Impact: Unauthorized modification of system resources.
• Availability Impact: Potential disruption of system operations.

CVSS 3.1 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

🧬 Technical Classification

CWE-88 — Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

Argument injection occurs when an application constructs a command without properly separating or validating its arguments.

This can allow untrusted input to influence how another process interprets command-line parameters.

Conceptual Root Cause

# Conceptual example of unsafe command construction

user_input = get_user_input()

command = "application.exe " + user_input

The example illustrates an unsafe programming pattern. It is not an exploit for CVE-2026-97798.

Security Considerations

• Validate untrusted input.
• Avoid unsafe command-string concatenation.
• Use structured process argument handling.
• Apply appropriate privilege boundaries.
• Audit process creation and execution.

💻 Affected Products

The following Windows product branches have been identified in vulnerability records.

Operating System	Affected Before Fixed Build
Windows 10 21H2	19044.7807
Windows 10 22H2	19045.7807
Windows 11 23H2	22631.7652
Windows 11 24H2	26100.9711
Windows 11 25H2	26200.9711
Windows 11 26H1	28000.3231
Windows 11 26H2	26300.9711
Windows Server 2022	20348.5761
Windows Server 2025	26100.33650

Important: The versions shown are branch-specific remediation thresholds. Verify the applicable cumulative update and servicing status through Microsoft's official advisory.

🔍 Detection & Investigation

The following commands can help administrators inspect Windows system information.

1. Identify Windows Version

Get-ComputerInfo |
Select-Object WindowsProductName, WindowsVersion, OsBuildNumber

2. Check Operating System Build

[System.Environment]:https://raw.githubusercontent.com/0xblackash/cve-2026-97798/main/:OSVersion.Version

3. Inspect Windows Error Reporting Logs

Get-WinEvent -ListLog *Windows Error Reporting*

4. Review Recent System Events

Get-WinEvent -LogName System -MaxEvents 50 |
Select-Object TimeCreated, Id, ProviderName, Message

5. Review Windows Update History

Get-HotFix |
Sort-Object InstalledOn -Descending |
Select-Object -First 10

These commands perform basic defensive inspection. They do not exploit the vulnerability or independently prove whether a system is vulnerable.

🛡️ Mitigation & Remediation

Recommended defensive actions:

1. Install the applicable Microsoft security update.
2. Verify the installed Windows build against the fixed version.
3. Monitor suspicious process creation and privilege changes.
4. Review Windows Error Reporting activity.
5. Apply the principle of least privilege.
6. Restrict unnecessary local administrative access.
7. Include Windows systems in regular vulnerability assessments.

Official Security Advisory

Microsoft Security Response Center — CVE-2026-97798

🧪 Research Methodology

This repository is organized around defensive vulnerability research.

Phase	Activity
01	CVE identification
02	Vulnerability classification
03	Affected version analysis
04	Root cause research
05	Defensive system inspection
06	Patch verification
07	Security documentation

📂 Repository Structure

CVE-2026-97798/
│
├── README.md
│
├── assets/
│   └── banner.png
│
├── detection/
│   └── check_windows_version.ps1
│
├── documentation/
│   ├── technical-analysis.md
│   └── remediation.md
│
└── LICENSE

📚 References

• Microsoft MSRC — CVE-2026-97798
• NIST National Vulnerability Database
• MITRE CWE-88 — Argument Injection
• CVE.org

⚖️ Disclaimer

This repository is intended exclusively for educational purposes, cybersecurity research, vulnerability awareness, and authorized defensive security assessments.

All testing should be conducted in isolated laboratory environments or on systems for which explicit authorization has been obtained.

The author is not responsible for misuse of the information provided in this repository.

---

🔐 Cybersecurity Research | Vulnerability Analysis | Defensive Security
Understand vulnerabilities. Strengthen security. Protect systems.