Vulnerability in Ec-Cube
CVE-2026-30777
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (44.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.006 · change: +0.002
Affected products
- Ec-Cube — versions 4.1.2, 4.2.3, 4.3.1
- Ec-Cube Co.,ltd. 4.1 Series — versions prior to 4.1.2-p5
- Ec-Cube Co.,ltd. 4.2 Series — versions prior to 4.2.3-p2
- Ec-Cube Co.,ltd. 4.3 Series — versions prior to 4.3.1-p1
Weakness classification (CWE)
References
- www.ec-cube.net/info/weakness/20260209/index.php (Patch, Vendor Advisory)
- jvn.jp/en/jp/JVN63765888/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2026-30777?
- CVE-2026-30777 is a medium-severity vulnerability in Ec-Cube, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 6.5/10. Published 2026-03-05.
- How severe is CVE-2026-30777?
- Medium severity. CVSS v3 base score is 6.5 out of 10.