Information Disclosure Vulnerability in Windows Event Logging Service by Microsoft
CVE-2026-34348

6.5MEDIUM

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1809
Windows 10 Version 21h2
Windows 10 Version 22h2
Windows 11 Version 23h2
Vendor
CVE Published:
14 July 2026

Badges

👾 Exploit Exists🟡 Public PoC📰 News Worthy

What is CVE-2026-34348?

A vulnerability exists in the Windows Event Logging Service due to a failure in its protection mechanisms, allowing an authorized attacker to potentially disclose sensitive information across a network. This could lead to unauthorized access to sensitive data or system information, emphasizing the need for immediate attention to system security and patching.

Affected Version(s)

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.9020

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.7548

Windows 10 Version 22H2 32-bit Systems 10.0.19045.0 < 10.0.19045.7548

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-34348
Created by HORKimhab

News Articles

favicon imageThe Hacker News

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Passkey attacks abuse Windows logs, Google Password Manager, and Windows Hello to bypass phishing-resistant MFA without breaking FIDO2.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • 📰

    First article discovered by The Hacker News

  • Vulnerability published

  • Vulnerability Reserved

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