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Vulnerability Assessment

Weakness
CWE
CWE-122
ASVS 5.0
V15 - Secure Coding and Architecture Heap buffer bounds checking
MITRE ATT&CK

1 technique across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Act Now Prioritize within 24-48h. Why: CRITICAL severity.
Patch available 0.7% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 14, 2026

Remote code execution in the Microsoft ODBC Driver for SQL Server (shipped across Windows 10, Windows 11, and Windows Server 2012 through 2025) stems from a heap-based buffer overflow that lets an attacker run arbitrary code over the network. The supplied CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N) scores it 9.8 and marks it unauthenticated, though as a database driver flaw the realistic trigger is a client connecting to a malicious or compromised SQL Server endpoint. There is no public exploit identified at time of analysis and no CISA KEV listing, so this is a high-severity but not yet actively-exploited issue.

Affected VersionsENISA

Windows Server 2012 6.2.9200.0 <6.2.9200.26132
Windows Server 2016 10.0.14393.0 <10.0.14393.9339
Windows 11 version 26H1 10.0.28000.0 <10.0.28000.2269
Windows 10 Version 21H2 10.0.19044.0 <10.0.19044.7548
Windows Server 2019 (Server Core installation) 10.0.17763.0 <10.0.17763.9020
Windows 10 Version 1809 10.0.17763.0 <10.0.17763.9020
Windows Server 2025 (Server Core installation) 10.0.26100.0 <10.0.26100.33158
Windows Server 2025 10.0.26100.0 <10.0.26100.33158
Windows 11 Version 24H2 10.0.26100.0 <10.0.26100.8875
Windows 11 Version 25H2 10.0.26200.0 <10.0.26200.8875
Windows Server 2016 (Server Core installation) 10.0.14393.0 <10.0.14393.9339
Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 <6.3.9600.23228
Windows 11 Version 23H2 10.0.22631.0 <10.0.22631.7376
Windows 10 Version 1607 10.0.14393.0 <10.0.14393.9339
Windows Server 2019 10.0.17763.0 <10.0.17763.9020
Windows Server 2012 R2 6.3.9600.0 <6.3.9600.23228
Windows 10 Version 22H2 10.0.19045.0 <10.0.19045.7548
Windows Server 2022 10.0.20348.0 <10.0.20348.5386
Windows Server 2012 (Server Core installation) 6.2.9200.0 <6.2.9200.26132

Affected Packages

microsoft windows_10_version_1607_10_0_14393_9339 fix: Windows 10 Version 1607 for 32-bit Systems 10.0.14393.9339, Windows 10 Version 1607 for x64-based Systems 10.0.14393.9339
microsoft windows_10_version_1809_10_0_17763_9020 fix: Windows 10 Version 1809 for 32-bit Systems 10.0.17763.9020, Windows 10 Version 1809 for x64-based Systems 10.0.17763.9020
microsoft windows_10_version_21h2_10_0_19044_7548 fix: Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.7548, Windows 10 Version 21H2 for ARM64-based Systems 10.0.19044.7548, Windows 10 Version 21H2 for x64-based Systems 10.0.19044.7548
microsoft windows_10_version_22h2_10_0_19045_7548 fix: Windows 10 Version 22H2 for 32-bit Systems 10.0.19045.7548, Windows 10 Version 22H2 for ARM64-based Systems 10.0.19045.7548, Windows 10 Version 22H2 for x64-based Systems 10.0.19045.7548
microsoft windows_11_version_23h2_10_0_22631_7376 fix: Windows 11 Version 23H2 for ARM64-based Systems 10.0.22631.7376, Windows 11 Version 23H2 for x64-based Systems 10.0.22631.7376
microsoft windows_11_version_24h2_10_0_26100_8875 fix: Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.8875, Windows 11 Version 24H2 for x64-based Systems 10.0.26100.8875
microsoft windows_11_version_25h2_10_0_26200_8875 fix: Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.8875, Windows 11 Version 25H2 for x64-based Systems 10.0.26200.8875
microsoft windows_11_version_26h1_10_0_28000_2269 fix: Windows 11 Version 26H1 for ARM64-based Systems 10.0.28000.2269, Windows 11 version 26H1 for x64-based Systems 10.0.28000.2269
microsoft windows_server_2012_6_2_9200_26132 fix: Windows Server 2012 6.2.9200.26132, Windows Server 2012 (Server Core installation) 6.2.9200.26132
microsoft windows_server_2012_r2_6_3_9600_23228 fix: Windows Server 2012 R2 6.3.9600.23228, Windows Server 2012 R2 (Server Core installation) 6.3.9600.23228
microsoft windows_server_2016_10_0_14393_9339 fix: Windows Server 2016 10.0.14393.9339, Windows Server 2016 (Server Core installation) 10.0.14393.9339
microsoft windows_server_2019_10_0_17763_9020 fix: Windows Server 2019 10.0.17763.9020, Windows Server 2019 (Server Core installation) 10.0.17763.9020
microsoft windows_server_2022_10_0_20348_5386 fix: Windows Server 2022 10.0.20348.5386
microsoft windows_server_2025_10_0_26100_33158 fix: Windows Server 2025 10.0.26100.33158, Windows Server 2025 (Server Core installation) 10.0.26100.33158
euvd windows_10_version_1607 fix: 10.0.14393.9339
euvd windows_10_version_1809 fix: 10.0.17763.9020
euvd windows_10_version_21h2 fix: 10.0.19044.7548
euvd windows_10_version_22h2 fix: 10.0.19045.7548
euvd windows_11_version_23h2 fix: 10.0.22631.7376
euvd windows_11_version_24h2 fix: 10.0.26100.8875
euvd windows_11_version_25h2 fix: 10.0.26200.8875
euvd windows_11_version_26h1 fix: 10.0.28000.2269
euvd windows_server_2012 fix: 6.2.9200.26132
euvd windows_server_2012_r2 fix: 6.3.9600.23228
euvd windows_server_2012_r2_server_core_installation fix: 6.3.9600.23228
euvd windows_server_2012_server_core_installation fix: 6.2.9200.26132
euvd windows_server_2016 fix: 10.0.14393.9339
euvd windows_server_2016_server_core_installation fix: 10.0.14393.9339
euvd windows_server_2019 fix: 10.0.17763.9020
euvd windows_server_2019_server_core_installation fix: 10.0.17763.9020
euvd windows_server_2022 fix: 10.0.20348.5386
euvd windows_server_2025 fix: 10.0.26100.33158
euvd windows_server_2025_server_core_installation fix: 10.0.26100.33158

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 33 packages in microsoft, euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

Vendor (microsoft) PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CIRCL (temporal) 8.5 HIGH

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

Heap-based buffer overflow in SQL Server ODBC driver allows an unauthorized attacker to execute code over a network.

Executive ViewAI

Why It Matters

The Microsoft ODBC Driver for SQL Server (bundled with Windows 10, Windows 11, and Windows Server 2012-2025) contains a critical remote code execution vulnerability (CVSS 9.8) exploitable by directing a client to a malicious SQL Server endpoint. This threatens any organization relying on SQL Server database connectivity across their Windows infrastructure, enabling attackers to execute arbitrary code without authentication. Immediate patching is required to prevent potential compromise of database clients and downstream lateral movement.

Recommended Action

Within 24 hours, inventory all systems running Windows 10, Windows 11, and Windows Server 2012-2025 that connect to SQL Server instances and confirm current patch status; notify database teams and infrastructure operations of the critical severity. Within 7 days, deploy the vendor-released patch to all production and development systems with SQL Server client connectivity, prioritizing those accessing sensitive databases. Within 30 days, complete patching across all remaining inventory and conduct vulnerability scanning to confirm remediation.

Business Impact: Severe
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.7%
Top 52% exploitable
Vendor Action
See Below
Required. The vulnerability documented by this CVE requires customer action to resolve.
Vendor Status
Publicly Disclosed:No
Exploited:No
Latest Software Release:Exploitation Unlikely
Data Quality
6 sources
Confidence: High
EUVD 🇯🇵JVN NVD CVE.org EPSS Vulnrichment MSRC VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 0.7%
Patch available Yes
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Out-of-Cycle
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact
Very High
Technical Impact
Total

Priority Score

50
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Heap Overflow HIGH

A heap overflow occurs when a program writes data beyond the bounds of a buffer allocated in the heap memory region.

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Same weakness CWE-122 – Heap-based Buffer Overflow

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References

Advisories & patches
PATCH https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42990 ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-42990 ADVISORY https://vuldb.com/vuln/378415

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