Is CVE-2026-2666 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-2666, but active exploitation has not been confirmed.

Can CVE-2026-2666 be exploited remotely?

Yes. CVE-2026-2666 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-2666?

CVE-2026-2666 has a CVSS score of 4.7 (MEDIUM) and an EPSS exploitation probability of 0.03%.

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MEDIUMPOC

CVE-2026-2666

CWE-284Published: February 18, 2026· Updated: Feb 19, 2026

4.7

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:10.4th

Official Description

A flaw has been found in mingSoft MCMS 6.1.1. The affected element is an unknown function of the file /ms/file/uploadTemplate.do of the component Template Archive Handler. Executing a manipulation of the argument File can lead to unrestricted upload. The attack can be launched remotely. The exploit has been published and may be used.

NVD Source

Technical Analysis

CVE-2026-2666 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.

A proof-of-concept (PoC) exploit exists for CVE-2026-2666. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.