Protected-data disclosure via path equivalence confusion
Published Sep 8, 2026 · Updated Sep 9, 2026
Security feature bypass in Windows URL Moniker allows remote attackers to expose protected data through crafted network content. The component treats distinct path spellings as equivalent across a security boundary, but Microsoft has not disclosed the exact path form or code locus. Exploitation requires user interaction and yields limited confidentiality loss, with no reported integrity or availability impact.
Summary
What happened
Security feature bypass in Windows URL Moniker allows remote attackers to expose protected data through crafted network content. The component treats distinct path spellings as equivalent across a security boundary, but Microsoft has not disclosed the exact path form or code locus. Exploitation requires user interaction and yields limited confidentiality loss, with no reported integrity or availability impact.
The record
- CVE
- CVE-2026-73019
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-41, CAPEC-3
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.17763.0 <10.0.17763.9245
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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