Vulnerability record · CVE-2026-53906 · published 1 July 2026

CVE-2026-53906: Mycomplianceoffice path traversal vulnerability

Mycomplianceoffice · Mycomplianceoffice

MCO is vulnerable to Path Disclosure and Path Traversal in file handling functionality related to data export and upload. Improper validation of the filename parameter allows writing files to arbitrary locations as well as indirect disclosure of absolute server paths through error messages. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

5.1 CVSS 4.0 Medium EPSS 0.52% · top 58.1% CWE-22 · Path traversalCWE-209 · Error message information leak

5.1CVSS 4.0 base score

0.52%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

2References

6 Jul 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Mycomplianceoffice Mycomplianceoffice

References

Link	Tags
https://cert.pl/en/posts/2026/07/CVE-2026-53902	Third Party Advisory
https://mco.mycomplianceoffice.com/	Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.1CVE-2026-53902Mycomplianceoffice incorrect authorization vulnerabilityMCO does not properly enforce authorization checks in the /customer/servlet/mco/webapi/profile-sections/group-membership endpoint. An authenticated u…EPSS 0.34%1 Jul 2026 6.9CVE-2026-53908Mycomplianceoffice vulnerabilityMCO is vulnerable to User Enumeration through authentication-related functionalities. The application returns distinguishable responses for valid and…EPSS 0.36%1 Jul 2026 5.3CVE-2026-53909Mycomplianceoffice unrestricted file upload vulnerabilityMCO does not correctly validate types of uploaded files. File upload validation functionality relies only on client-side checks, which can be bypasse…EPSS 0.39%1 Jul 2026 5.3CVE-2026-53903Mycomplianceoffice insecure direct object reference vulnerabilityMCO is vulnerable to an Insecure Direct Object Reference (IDOR) vulnerability in the /customer/servlet/mco/webapi/trading-document/fetchPdfStatement …EPSS 0.41%1 Jul 2026 5.3CVE-2026-53905Mycomplianceoffice incorrect authorization vulnerabilityMCO does not properly enforce authorization checks in the /customer/servlet/mco/webapi/admin-view-hierarchy/get-acl-tree-structure endpoint. An authe…EPSS 0.32%1 Jul 2026 4.8CVE-2026-53907Mycomplianceoffice cross-site scripting vulnerabilityMCO is vulnerable to Stored Cross‑Site Scripting (XSS) via the application logo upload functionality. An attacker with the ability to change the appl…EPSS 0.24%1 Jul 2026 9.8CVE-2026-93616Checkpoint multi-domain security management path traversal vulnerabilityA directory traversal and file upload vulnerability allows an unauthenticated attacker to upload and execute arbitrary scripts on Check Point Managem…KEVEPSS 20%22 Sep 2026 10.0CVE-2026-85706GitLab CE/EE repository commits API path traversal allows unauthenticated file readGitLab CE/EE contains improper path confinement and missing authentication enforcement in the repository commits API, allowing an unauthenticated use…KEVEPSS 91%analysed12 Sep 2026

Source: NIST National Vulnerability Database (record CVE-2026-53906), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.