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Severity by source

Vendor (microsoft) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CIRCL (temporal)
5.7 MEDIUM
cvss
vuln.today AI
6.5 MEDIUM

PR:L confirmed by 'authorized attacker' in description; AV:N consistent with Event Log remote interface; C:H and I:N/A:N match pure information disclosure with no modification or disruption impact.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

2
Analysis Generated
Jul 14, 2026 - 21:58 vuln.today
CVE Published
Jul 14, 2026 - 17:05 nvd
MEDIUM 6.5

DescriptionCVE.org

Protection mechanism failure in Windows Event Logging Service allows an authorized attacker to disclose information over a network.

AnalysisAI

Windows Event Logging Service across a wide range of Windows 10, Windows 11, and Windows Server versions fails to enforce its intended protection mechanisms, permitting any authenticated low-privileged network user to read information that should be access-controlled. The CVSS vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) confirms exploitation requires only a valid low-privilege account and network connectivity, with no user interaction and no elevated rights - making it a practical post-compromise lateral-movement or reconnaissance tool. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain low-privileged Windows credentials
Delivery
Connect over network to target host
Exploit
Send crafted request to Event Logging Service RPC interface
Execution
Trigger protection mechanism bypass
Persist
Receive restricted event log data
Impact
Extract sensitive audit records for reconnaissance

Vulnerability AssessmentAI

Exploitation The CVSS PR:L metric confirms that a valid low-privileged authenticated account is required - unauthenticated or anonymous exploitation is not supported by the available data. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 6.5 is well-grounded in the vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N): network-reachable, low complexity, low-privilege authenticated, no user interaction, no scope change, confidentiality impact only. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who has obtained a low-privileged domain or local account - through credential phishing, password spraying, or lateral movement - connects over the network to a target Windows host and issues requests to the Windows Event Logging Service. Due to the protection mechanism failure, the service returns event log records beyond the caller's authorized scope, potentially exposing Security log entries containing logon activity, process execution details, or cleartext credentials passed via command-line arguments. …
Remediation Apply the vendor-released security update published by Microsoft via Windows Update, WSUS, or Microsoft Update Catalog; consult https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34348 for specific KB article numbers and servicing channel guidance applicable to each affected Windows version. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-43788 vulnerability details – vuln.today

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