CVE-2026-2234: HGiga｜C&Cm@il - Missing Authentication

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-09 · updated 2026-06-17
Weakness: CWE-306

Description

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

Affected products

HGiga C&Cm@il package olln-base: before 7.0-978 — fixed in 7.0-978

How to fix

Upgrade to a fixed version: HGiga C&Cm@il package olln-base 7.0-978. Check the vendor advisory for mitigations.

References

https://www.twcert.org.tw/en/cp-139-10704-d5aba-2.html
https://www.twcert.org.tw/tw/cp-132-10703-3d02f-1.html

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