Is CVE-2026-53906 actively exploited?

No active exploitation of CVE-2026-53906 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-53906 be exploited remotely?

Yes. CVE-2026-53906 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-53906?

CVE-2026-53906 has a CVSS score of 5.1 (MEDIUM).

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MEDIUM

CVE-2026-53906

CWE-22Published: July 1, 2026· Updated: Jul 1, 2026

5.1

CVSS v3.1

EPSS:0.42%probability of exploitation in 30 daysPercentile:33.6th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-53906 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high 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.High

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

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:X/V:X/RE:X/U:X