Is CVE-2026-53905 actively exploited?

No active exploitation of CVE-2026-53905 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-53905 be exploited remotely?

Yes. CVE-2026-53905 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-53905?

CVE-2026-53905 has a CVSS score of 5.3 (MEDIUM).

HOME VULNERABILITIESCVE-2026-53905

MEDIUM

CVE-2026-53905

CWE-863Published: July 1, 2026· Updated: Jul 1, 2026

5.3

CVSS v3.1

EPSS:0.23%probability of exploitation in 30 daysPercentile:14.2th

Official Description

MCO does not properly enforce authorization checks in the /customer/servlet/mco/webapi/admin-view-hierarchy/get-acl-tree-structure endpoint. An authenticated, low-privileged user can retrieve administrator access control structures without proper authorization checks.

This may expose sensitive permission mappings and internal configuration details.

Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

NVD Source

Technical Analysis

CVE-2026-53905 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/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:X/V:X/RE:X/U:X