What is CVE-2026-66358?

CVE-2026-66358 is a medium-severity vulnerability in Extra Innovation Inc. Acmailer Cgi, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-08-19.

How severe is CVE-2026-66358?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Extra Innovation Inc. Acmailer Cgi

CVE-2026-66358

A cross-site scripting vulnerability exists in acmailer, which may allow an attacker to execute an arbitrary script.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Extra Innovation Inc. Acmailer Cgi
Extra Innovation Inc. Acmailer Db

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

vultures@jpcert.or.jp
vultures@jpcert.or.jp

Frequently asked questions

What is CVE-2026-66358?: CVE-2026-66358 is a medium-severity vulnerability in Extra Innovation Inc. Acmailer Cgi, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-08-19.
How severe is CVE-2026-66358?: Medium severity. CVSS v3 base score is 6.1 out of 10.