CVE-2026-56642: CWE-121: Stack-based Buffer Overflow in Microsoft Service Fabric
Stack-based buffer overflow in Microsoft Fabric Data Warehouse allows an authorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-56642) involves a stack-based buffer overflow in Microsoft Fabric Data Warehouse within Service Fabric. An attacker with authorized access can exploit this flaw to execute arbitrary code remotely. The vulnerability is classified under CWE-121 and has a CVSS 3.1 score of 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as detailed in their security advisory.
Potential Impact
Successful exploitation of this vulnerability could allow an authorized attacker to execute arbitrary code remotely, potentially leading to full compromise of the affected system. The impact includes complete loss of confidentiality, integrity, and availability of the Service Fabric instance running the vulnerable Fabric Data Warehouse component.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the provided patch from the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56642 to remediate this vulnerability.
CVE-2026-56642: CWE-121: Stack-based Buffer Overflow in Microsoft Service Fabric
Description
Stack-based buffer overflow in Microsoft Fabric Data Warehouse allows an authorized attacker to execute code over a network.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-56642) involves a stack-based buffer overflow in Microsoft Fabric Data Warehouse within Service Fabric. An attacker with authorized access can exploit this flaw to execute arbitrary code remotely. The vulnerability is classified under CWE-121 and has a CVSS 3.1 score of 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as detailed in their security advisory.
Potential Impact
Successful exploitation of this vulnerability could allow an authorized attacker to execute arbitrary code remotely, potentially leading to full compromise of the affected system. The impact includes complete loss of confidentiality, integrity, and availability of the Service Fabric instance running the vulnerable Fabric Data Warehouse component.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the provided patch from the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56642 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-22T15:17:38.795Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56642","vendor":"Microsoft"}]
Threat ID: 6a5676bc68715ace43f0af5e
Added to database: 07/14/2026, 17:49:48 UTC
Last enriched: 07/14/2026, 18:37:42 UTC
Last updated: 07/15/2026, 00:07:33 UTC
Views: 2
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