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CWE-284 (访问控制不恰当) — Vulnerability Class 2612

2612 vulnerabilities classified as CWE-284 (访问控制不恰当). AI Chinese analysis included.

CWE-284 represents a critical security weakness where software fails to properly restrict access to sensitive resources, allowing unauthorized actors to interact with data or functions they should not reach. This flaw typically arises when developers neglect to implement robust authentication or authorization checks, enabling attackers to bypass security controls through direct URL manipulation, token forgery, or privilege escalation techniques. Exploitation often leads to severe consequences, including data breaches, unauthorized system modifications, or complete service disruption. To mitigate this risk, developers must enforce strict access control policies at every layer of the application architecture. This involves implementing comprehensive identity verification, applying the principle of least privilege, and rigorously validating user permissions before granting access to any protected resource, ensuring that only authenticated and authorized users can perform specific actions.

MITRE CWE Description
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Access control involves the use of several protection mechanisms such as: Authentication (proving the identity of an actor) Authorization (ensuring that a given actor can access a resource), and Accountability (tracking of activities that were performed) When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses: Specification: incorrect privileges, permissions, ownership, etc. are explicitly specified for either the user or the resource (for example, setting a password file to be world-writable, or giving administrator capabilities to a guest user). This action could be performed by the program or the administrator. Enforcement: the mechanism contains errors that prevent it from properly enforcing the specified access control requirements (e.g., allowing the user to specify their own privileges, or allowing a syntactically-incorrect ACL to produce insecure settings). This problem occurs within the program itself, in that it does not actually enforce the intended security policy that the administrator specifies.
Common Consequences (1)
Other Varies by Context
Mitigations (2)
Architecture and Design, Operation Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
Architecture and Design Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separatio…
Examples (2)
This code temporarily raises the program's privileges to allow creation of a new user folder.
def makeNewUserDir(username): if invalidUsername(username): #avoid CWE-22 and CWE-78 print('Usernames cannot contain invalid characters') return False try: raisePrivileges() os.mkdir('/home/' + username) lowerPrivileges() except OSError: print('Unable to create new user directory for user:' + username) return False return True
Bad · Python
This function runs an arbitrary SQL query on a given database, returning the result of the query.
function runEmployeeQuery($dbName, $name){ mysql_select_db($dbName,$globalDbHandle) or die("Could not open Database".$dbName); //Use a prepared statement to avoid CWE-89 $preparedStatement = $globalDbHandle->prepare('SELECT * FROM employees WHERE name = :name'); $preparedStatement->execute(array(':name' => $name)); return $preparedStatement->fetchAll(); } /.../ $employeeRecord = runEmployeeQuery('EmployeeDB',$_GET['EmployeeName']);
Bad · PHP
CVE ID Title CVSS Severity Published
CVE-2026-40420 Microsoft Office Click-To-Run Elevation of Privilege Vulnerability — Microsoft 365 Apps for Enterprise 8.8 High 2026-05-12
CVE-2026-32209 Windows Filtering Platform (WFP) Security Feature Bypass Vulnerability — Windows 10 Version 1607 4.4 Medium 2026-05-12
CVE-2026-41614 M365 Copilot for Desktop Spoofing Vulnerability — M365 Copilot for Desktop 6.2 Medium 2026-05-12
CVE-2026-41102 Microsoft PowerPoint for Android Spoofing Vulnerability — Microsoft PowerPoint for Android 7.1 High 2026-05-12
CVE-2026-41101 Microsoft Word for Android Spoofing Vulnerability — Microsoft Word for Android 7.1 High 2026-05-12
CVE-2026-41100 Microsoft 365 Copilot for Android Spoofing Vulnerability — Microsoft 365 Copilot for Android 4.4 Medium 2026-05-12
CVE-2026-33834 Windows Event Logging Service Elevation of Privilege Vulnerability — Windows 10 Version 1607 7.8 High 2026-05-12
CVE-2026-44277 Fortinet FortiAuthenticator 访问控制错误漏洞 — FortiAuthenticator 9.1 Critical 2026-05-12
CVE-2026-40300 Zulip: Message edit history visible in "moves only" policy through /api/v1/messages/{id}/history — zulip - - 2026-05-12
CVE-2026-40020 Open-Xchange OX Dovecot Pro 访问控制错误漏洞 — OX Dovecot Pro 3.1 Low 2026-05-12
CVE-2026-8233 Dotouch XproUPF access control — XproUPF 4.6 Medium 2026-05-10
CVE-2026-42569 phpvms: /importer authorization bypass causing full database wipe — phpvms 9.4 Critical 2026-05-09
CVE-2026-42205 Avo: Broken Access Control: Unauthorized Execution of Arbitrary Action Classes Across Resources — avo 8.8 High 2026-05-08
CVE-2026-41487 Langfuse: Improper role-based-access control in Langfuse LLM connection management allowed users of role “member” to retrieve stored LLM provider API keys — langfuse 6.5AI Medium AI 2026-05-08
CVE-2026-42278 UltraDAG: Smart Account Spending Policy Bypass via Pockets — core 7.5AI High AI 2026-05-08
CVE-2026-41646 Nuclei: Local File Read via require() Module Loader Bypass — nuclei 5.5 Medium 2026-05-08
CVE-2026-8127 eladmin Users API Endpoint UserController.java checkLevel access control — eladmin 6.3 Medium 2026-05-08
CVE-2026-35435 Azure AI Foundry Elevation of Privilege Vulnerability — Azure AI Foundry 8.6 High 2026-05-07
CVE-2026-33109 Azure Managed Instance for Apache Cassandra Remote Code Execution Vulnerability — Azure Managed Instance for Apache Cassandra 9.9 Critical 2026-05-07
CVE-2026-5788 Ivanti EPMM 访问控制错误漏洞 — Endpoint Manager Mobile 7.0 High 2026-05-07
CVE-2026-5786 Ivanti EPMM 访问控制错误漏洞 — Endpoint Manager Mobile 8.8 High 2026-05-07
CVE-2026-20167 Cisco IoT Field Network Director Remote Device Denial of Service Vulnerability — Cisco IoT Field Network Director (IoT-FND) 7.7 High 2026-05-06
CVE-2026-7686 eyeo Adblock Plus Legacy Premium Activation premium.preload.js postMessage access control — Adblock Plus 5.3 Medium 2026-05-03
CVE-2026-2311 IBM i is affected by a privilege escalation vulnerability in Web Administration GUI [] — i 6.4 Medium 2026-04-30
CVE-2026-40603 Chartbrew: Incorrect Access Control in /api/project/dashboard/:brewName via same-team override — chartbrew 6.5 Medium 2026-04-30
CVE-2026-40595 Chartbrew: Incorrect Access Control in public chart and export routes via missing onReport and SharePolicy checks — chartbrew 7.5 High 2026-04-30
CVE-2026-40904 Chartbrew: Incorrect Access Control in dataset and dataRequest routes via team-scoped permission checks — chartbrew 8.1 High 2026-04-30
CVE-2026-7468 1024-lab smart-admin Demo Site index.html access control — smart-admin 7.3 High 2026-04-30
CVE-2026-5780 Multiple vulnerabilities in MphRx's Minerva — Minerva 4.3AI Medium AI 2026-04-28
CVE-2026-5779 Multiple vulnerabilities in MphRx's Minerva — Minerva 8.1AI High AI 2026-04-28

Vulnerabilities classified as CWE-284 (访问控制不恰当) represent 2612 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.