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CVE-2026-30777

MEDIUM
6.5
CVSS Score
Published: March 5, 2026 at 05:31 AM UTC
Updated: June 17, 2026 at 10:32 AM UTC
1 product affected across 1 vendorEc Cube

Using EC-CUBE 4.1 series by EC-CUBE CO.,LTD.?

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

EC-CUBE provided by EC-CUBE CO.,LTD. contains a multi-factor authentication (MFA) bypass vulnerability. An attacker who has obtained a valid administrator ID and password may be able to bypass two-factor authentication and gain unauthorized access to the administrative page.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ec Cube· Ec Cube
95%
v < 4.1.2-p5v < 4.2.3-p2v < 4.3.1-p14.1.0 ≤ v < 4.1.24.2.0 ≤ v < 4.2.34.3.0 ≤ v < 4.3.14.1.24.1.2 p14.1.2 p24.1.2 p34.1.2 p44.2.34.2.3 p14.3.1
Affected range stops below 4.1.2-p5, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.2.3-p2, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.3.1-p1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

PatchVendor Advisory
Source: cverecord
https://www.ec-cube.net/info/weakness/20260209/index.php
Third Party Advisory
Source: cverecord
https://jvn.jp/en/jp/JVN63765888/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-288

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