CVE-2026-53904— Account Denial of Service in MCO
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| MyComplianceOffice | MCO | 25.3.3.1 | affected |
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I. Basic Information for CVE-2026-53904
Vulnerability Information
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Vulnerability Title
Account Denial of Service in MCO
Source: NVD (National Vulnerability Database)
Vulnerability Description
MCO is vulnerable to Account Denial of Service due to improper implementation of password reset functionality. Each password reset request invalidates previously set password as well as previously issued temporary passwords, furthermore, password resets are not limited in any way. An attacker who provides victim's email and answer to their security question, can successfully initiate the reset process and continuously invalidate credentials, effectively locking the victim out of their account. Answering security questions has a limited number of tries which lowers the risk of this vulnerability. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
过多认证尝试的限制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
MyComplianceOffice MCO 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MyComplianceOffice MCO是MyComplianceOffice公司的一款合规与风险管理软件。 MyComplianceOffice MCO 25.3.3.1版本存在授权问题漏洞，该漏洞源于密码重置功能实现不当，可能导致攻击者通过提供受害者的电子邮件和安全问题答案发起重置请求，持续作废凭证，造成账户拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| MyComplianceOffice | MCO | 25.3.3.1 | - |
II. Public POCs for CVE-2026-53904
| # | POC Description | Source Link | Shenlong Link |
|---|
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Security Blog Posts for CVE-2026-53904 (1)
- 🔗 Vulnerabilities in MyComplianceOffice MCO software | CERT Polskathird-party-advisory
Vendor Pages for CVE-2026-53904 (1)
Same Patch Batch · MyComplianceOffice · 2026-07-01 · 8 CVEs total
| CVE-2026-53902 | Privilege Escalation in MCO | |
| CVE-2026-53908 | User Enumeration in MCO | |
| CVE-2026-53903 | Insecure Direct Object Reference in MCO | |
| CVE-2026-53907 | Stored Cross‑Site Scripting in MCO | |
| CVE-2026-53906 | Path Disclosure and Path Traversal in MCO | |
| CVE-2026-53905 | Unauthorized Access to Administrator ACL View in MCO | |
| CVE-2026-53909 | Arbitrary File Upload in MCO |
IV. Related Vulnerabilities
Same weakness: CWE-307
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PayloadCMS 3.84.1 - Authenticated account lockout bypass thr - CVE-2026-50176
EVoke Systems EVoke CSMS Improper Restriction of Excessive A - CVE-2026-56234
Capgo - Password Spraying via Public-Key Accessible Credenti - CVE-2026-56450
AIL Framework - Missing Rate Limiting Enables Brute-Force At
V. Comments for CVE-2026-53904
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