Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessGain low-privileged network position to connector
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DeliveryInterpose on or control MySQL endpoint
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ExploitDeliver crafted protocol response
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ExecutionTrigger connector flaw (AC:H)
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PersistTake over connector context
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ImpactPivot via scope change to host application
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK
1 technique across 1 tactic: Defense Evasion The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Exploitation requires the low-privileged attacker to have network reach to the vulnerable connector over one of the multiple supported MySQL protocols (PR:L confirms some pre-existing privilege is needed; per CVSS this is authenticated). The high attack complexity (AC:H) means success is conditional on hard-to-control factors - Oracle labels it 'difficult to exploit' - likely requiring the attacker to control or interpose on the database endpoint the connector communicates with so it can return crafted protocol data to the client. Limiting factors: only Connector/Net versions 9.7.0 and 9.7.1 are affected; the target must be a .NET application actually using this connector; and the attacker must both hold low-level privileges and win the high-complexity condition, which together make opportunistic mass exploitation unlikely. |
| Impact | Signals here are mixed and warrant nuance. The CVSS 3.1 score of 8.5 is HIGH and driven largely by the scope change (S:C) plus full C:H/I:H/A:H impact, but two metrics substantially temper real-world risk: AC:H (Oracle explicitly calls it 'difficult to exploit') and PR:L (the attacker must already hold some low-level privilege). No EPSS score was provided, so exploitation probability cannot be quantified. It is NOT in CISA KEV (no confirmed active exploitation) and no POC was supplied, so this is best treated as a real but non-emergency priority - patch on a normal CPU cadence rather than as an out-of-band fire drill. One tension to verify with Oracle: AV:N implies a network vector, yet a client-side connector is typically attacked by a malicious or compromised server/peer it talks to, so 'network access' realistically means the attacker controls or interposes on the database endpoint the connector reaches - confirm the exact attack surface before finalizing exposure assumptions. |
| Exploit ScenarioDerived | An attacker who controls or can intercept a MySQL endpoint that a vulnerable .NET application connects to - via a compromised database host, a rogue server, or a man-in-the-middle position - returns crafted protocol responses that trigger the connector flaw, taking over the connector's execution context within the client application. Because of the scope change, this foothold can be leveraged to impact resources beyond the connector, such as the host application and its data. No public POC is available, and the high attack complexity means the attacker must satisfy specific timing or configuration preconditions to succeed. |
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Alert meAnalysisAIv1 – Jul 21, 2026
Full takeover of Oracle MySQL Connector/Net (versions 9.7.0 and 9.7.1) is possible by a low-privileged network attacker who wins a high-complexity attack, with a scope change that lets the compromise significantly impact products beyond the connector itself. Oracle rates this CVSS 3.1 8.5 with high confidentiality, integrity, and availability impact, and it is addressed in the July 2026 Critical Patch Update. There is no public exploit identified at time of analysis and it is not listed in CISA KEV.
RemediationAI
Upgrade MySQL Connector/Net to the fixed release delivered in the Oracle July 2026 Critical Patch Update; consult https://www.oracle.com/security-alerts/cpujul2026.html for the exact patched version, as the specific fix build is not enumerated in the available data (Patch available per vendor advisory - released patched version not independently confirmed here). Because the vulnerability is client-side, rebuild and redeploy every .NET application that bundles the affected 9.7.0/9.7.1 connector rather than only patching database servers. Until patched, reduce exposure by ensuring applications connect only to trusted, authenticated MySQL endpoints over TLS (preventing a rogue or man-in-the-middle server from delivering a malicious response), restricting outbound database connectivity to known hosts via network egress rules, and running the application process with least privilege to blunt the scope-change impact; the trade-off is that strict endpoint pinning and egress filtering can break legitimate dynamic or multi-tenant database connectivity and must be tested against your deployment topology.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
MySQL Connector/Net is Oracle's official ADO.NET-compatible data provider used by .NET/C
applications to connect to MySQL and MySQL-compatible databases. The flaw lives in the client-side connector library rather than the MySQL server, so the trust boundary crossed is the application process embedding the driver. The scope-change flag (S:C) in the CVSS vector indicates that exploiting the connector can affect resources beyond the vulnerable component's own security authority - for example the host application, other libraries, or downstream data consumers. No CWE was assigned in the source data, so the precise weakness class (e.g., deserialization, injection, or memory-safety in wire-protocol parsing) cannot be confirmed from the available intelligence; the 'multiple protocols' phrasing suggests more than one transport/authentication path can reach the vulnerable code.
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Severity by source
AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Concur with Oracle: network-reachable but hard to exploit (AC:H) requiring some privilege (PR:L), no user interaction, and a scope change enabling full C/I/A takeover impacting other components.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
DescriptionCVE.org
Vulnerability in the MySQL Connectors product of Oracle MySQL (component: Connector/Net). Supported versions that are affected are 9.7.0-9.7.1. Difficult to exploit vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Connectors. While the vulnerability is in MySQL Connectors, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of MySQL Connectors. CVSS 3.1 Base Score 8.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H).
Executive ViewAI
Oracle MySQL Connector/Net versions 9.7.0 and 9.7.1 contain a critical vulnerability enabling complete system takeover by low-privileged network attackers, exposing affected organizations to unauthorized access, data theft, and operational disruption. The vulnerability's scope change means compromise extends beyond the connector itself to impact dependent applications and infrastructure. Any organization using these versions faces material risk to confidentiality, integrity, and availability.
Apply Oracle July 2026 Critical Patch Update immediately. Pending patch deployment, restrict network-level access to affected systems to trusted hosts and low-privileged user accounts, monitor authentication logs for exploitation attempts, and disable the connector where business operations permit.
Threat Intelligence Overview
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.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
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