Authenticated service interruption via uncaught exception
Published Sep 8, 2026 · Updated Sep 9, 2026
Uncaught exception handling in Microsoft Windows iSCSI Target Service allows remote authenticated users to interrupt service over a network. Microsoft identifies an uncaught exception but has not disclosed the input, request path, or code locus that fails to handle it. Network access with low privileges is required, and successful exploitation stops service availability without reported data disclosure or modification.
Summary
What happened
Uncaught exception handling in Microsoft Windows iSCSI Target Service allows remote authenticated users to interrupt service over a network. Microsoft identifies an uncaught exception but has not disclosed the input, request path, or code locus that fails to handle it. Network access with low privileges is required, and successful exploitation stops service availability without reported data disclosure or modification.
The record
- CVE
- CVE-2026-69839
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-248, T1499
- Attack vector
- network
- Privileges
- authenticated
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.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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