Which versions of Mcms are affected by CVE-2026-2666?

Organizations using A flaw should be aware of moderate risk from CVE-2026-2666, a improper access control vulnerability rated CVSS 4.7.

Is there a public PoC exploit available for CVE-2026-2666?

Yes, a public proof-of-concept exploit is available for CVE-2026-2666. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-2666?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Mcms CVE-2026-2666

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

CVE-2026-2666 has a CVSS 4.0 base score of 2.0 (Low). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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. EPSS exploitation probability: 0.0%.

LOW

Improper Access Control (CWE-284)

2026-02-18 cna@vuldb.com

GHSA-r9wp-qq53-qvjx

File Upload Authentication Bypass Mcms

2.0

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

2.0 LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

MEDIUM LOW

CVSS changed

Apr 29, 2026 - 01:11 NVD

4.7 (MEDIUM) 2.0 (LOW)

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

PoC Detected

Feb 19, 2026 - 18:36 vuln.today

Public exploit code

CVE Published

Feb 18, 2026 - 20:18 nvd

MEDIUM 4.7

DescriptionCVE.org

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.

AnalysisAI

Unrestricted file upload in mingSoft MCMS 6.1.1's template archive handler allows authenticated attackers with high privileges to upload arbitrary files via manipulation of the File parameter in /ms/file/uploadTemplate.do. Public exploit code exists for this vulnerability and no patch is currently available. The attack requires network access and high-level authentication but could lead to remote code execution or system compromise.

Technical ContextAI

Classified as CWE-284 (Improper Access Control). Affects Mcms. 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.