What is the CVSS score of EUVD-2026-44254?

EUVD-2026-44254 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.9%.

Which versions of Microsoft Fabric are affected by EUVD-2026-44254?

Microsoft Fabric Data Warehouse contains a remote code execution vulnerability (CVSS 8.8) allowing authenticated users with low-privilege access to execute arbitrary code, creating direct risk to…. A patch is available.

How to fix or mitigate EUVD-2026-44254?

Within 24 hours, inventory all Microsoft Fabric Data Warehouse deployments and document users or service accounts with low-privilege access; enable audit logging on administrative and data operations. Within 7 days, apply the vendor patch provided by Microsoft Security Response Center (MSRC) to all affected instances. Within 30 days, verify patch deployment across the environment, review audit logs from the vulnerability window for suspicious activity, and confirm low-privilege users cannot execute code outside authorized scope.

Microsoft Fabric EUVD-2026-44254

| CVE-2026-56642 HIGH

Stack-based Buffer Overflow (CWE-121)

2026-07-14 microsoft

GHSA-m474-xrpw-p6pj

Buffer Overflow Microsoft Stack Overflow Service Fabric

8.8

CVSS 3.1 · Vendor: microsoft

Temporal: 7.7

Severity by source

Vendor (microsoft) PRIMARY

8.8 HIGH

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

ENISA EUVD

HIGH

qualitative

CIRCL (temporal)

7.7 HIGH

cvss

vuln.today AI

8.8 HIGH

Network-reachable stack overflow requiring a low-privilege authorized account (PR:L) with no user interaction and low complexity, yielding full code execution and high CIA impact.

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

4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Jul 14, 2026 - 19:03 vuln.today

CVE Published

Jul 14, 2026 - 17:09 nvd

HIGH 8.8

DescriptionCVE.org

Stack-based buffer overflow in Microsoft Fabric Data Warehouse allows an authorized attacker to execute code over a network.

AnalysisAI

Remote code execution in Microsoft Fabric Data Warehouse allows an authenticated attacker to run arbitrary code over the network by triggering a stack-based buffer overflow (CWE-121). The flaw carries a CVSS 8.8 rating with high impact to confidentiality, integrity, and availability, and requires only low-privilege access with no user interaction. There is no public exploit identified at time of analysis and the CVE is not listed in CISA KEV, but a vendor patch is available via MSRC.

Technical ContextAI

The vulnerability is a classic stack-based buffer overflow (CWE-121), where attacker-controlled input is copied into a fixed-size stack buffer without adequate bounds checking, corrupting adjacent stack memory such as saved return addresses and enabling control-flow hijacking. The affected component is Microsoft's Fabric platform; note a source discrepancy - the CVE description names 'Microsoft Fabric Data Warehouse' while the supplied CPE (cpe:2.3:a:microsoft:service_fabric) and tags reference Microsoft Service Fabric, which is Microsoft's distributed-systems microservice orchestration platform. Both are network-facing Azure/enterprise services that process serialized or query-related input, providing a plausible vector for malformed data to reach a vulnerable native parsing routine. Because the CVSS scope is Unchanged (S:U), the code executes within the security context of the vulnerable service process rather than crossing a trust boundary to another component.

RemediationAI

Apply the Microsoft-supplied fix: a patch is available per the vendor advisory (Patch available per vendor advisory) at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56642 - for cloud-hosted Fabric/Service Fabric the mitigation is largely delivered by Microsoft's service updates, while any self-managed Service Fabric clusters should be upgraded to the patched runtime version identified in the MSRC guidance. As compensating controls until patching is confirmed, restrict network access to the affected service endpoints to trusted management networks and audit/rotate low-privilege credentials that could satisfy the PR:L prerequisite, since limiting who can reach and authenticate to the service directly reduces the exploitable population; the trade-off is potential disruption to legitimate low-privilege integrations and automation that rely on those endpoints. Exact patched version numbers are not present in the input data and must be taken from the MSRC advisory rather than assumed.