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Program Compatibility Assistant CVE-2026-68873

| EUVDEUVD-2026-73413 MEDIUM
Insertion of Sensitive Information into Log File (CWE-532)
2026-09-08 secure@microsoft.com GHSA-4vp8-4w4f-hch2
5.5
CVSS 3.1 · Vendor: microsoft
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Severity by source

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

Local-only vector with low-privilege requirement; confidentiality-only impact as log reading yields no write or denial-of-service capability.

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

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

3
Analysis Generated
Sep 09, 2026 - 02:50 vuln.today
Patch available
Sep 08, 2026 - 18:35 EUVD
CVE Published
Sep 08, 2026 - 18:18 cve.org
MEDIUM 5.5

DescriptionCVE.org

Insertion of sensitive information into log file in Windows Program Compatibility Assistant Service allows an authorized attacker to disclose information locally.

AnalysisAI

Sensitive information disclosure in the Windows Program Compatibility Assistant (PCA) Service allows a locally authenticated attacker with standard user privileges to read sensitive data written to log files. Affected systems include Windows 11 versions 23H2 through 26H1 and Windows Server 2025 in both full and Server Core configurations. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires an interactive or remote desktop session with at least a low-privilege (standard user) Windows account on an affected build of Windows 11 (23H2, 24H2, 25H2, 26H1) or Windows Server 2025. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N accurately reflects the threat model: exploitation is strictly local, requires only a standard (low-privilege) user account, and has no integrity or availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the Microsoft security update that addresses this vulnerability. … 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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CVE-2026-68873 vulnerability details – vuln.today

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