CVE-2026-69839: CWE-248: Uncaught Exception in Microsoft Windows 10 Version 1607
Description
CVE-2026-69839 is a vulnerability in Microsoft Windows 10 Version 1607 and related versions where an uncaught exception in the Windows iSCSI Target Service can be triggered by an authorized attacker to cause a denial of service over the network. The vulnerability has a medium severity rating with a CVSS score of 6.5. Official patches are available from Microsoft to address this issue.
CVSS v3.1
Score 6.5medium
Affected software
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
Microsoft
Windows Server 2012
Microsoft
Windows Server 2012 (Server Core installation)
Microsoft
Windows Server 2012 R2
Microsoft
Windows Server 2012 R2 (Server Core installation)
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an uncaught exception in the Windows iSCSI Target Service on affected versions of Microsoft Windows 10 and related Windows versions. An authorized attacker can exploit this flaw to cause a denial of service condition remotely over the network. The flaw is tracked as CWE-248 (Uncaught Exception). Multiple affected Windows versions are identified, and Microsoft has released official fixes to remediate the issue.
Potential Impact
The impact of this vulnerability is denial of service (DoS) caused by an uncaught exception in the Windows iSCSI Target Service. There is no confidentiality or integrity impact reported. The attacker must be authorized and can cause service disruption remotely. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft for the affected Windows versions as detailed in the Microsoft Security Response Center advisory. No additional mitigation steps are required beyond applying the official patches.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T22:51:46.190Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69839","vendor":"Microsoft"}]
Threat ID: 6aa04532acd9273b49fa9a40
Added to database: 09/08/2026, 17:26:10 UTC
Last enriched: 10/16/2026, 21:36:37 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 42
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