What is CVE-2026-2234?

CVE-2026-2234 is a critical-severity vulnerability in Hgiga C&cm@il Package Olln-Base, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2026-02-09.

How severe is CVE-2026-2234?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Hgiga C&cm@il Package Olln-Base

CVE-2026-2234

C&Cm@il developed by HGiga has a Missing Authentication vulnerability, allowing unauthenticated remote attackers to read and modify any user's mail content.

Vulnerability class: Broken Authentication

Published 2026-02-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.005 (38.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000

Affected products

Hgiga C&cm@il Package Olln-Base — versions 0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.twcert.org.tw/tw/cp-132-10703-3d02f-1.html (third-party-advisory)
www.twcert.org.tw/en/cp-139-10704-d5aba-2.html (third-party-advisory)

Frequently asked questions

What is CVE-2026-2234?: CVE-2026-2234 is a critical-severity vulnerability in Hgiga C&cm@il Package Olln-Base, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2026-02-09.
How severe is CVE-2026-2234?: Critical severity. CVSS v3 base score is 9.1 out of 10.