Auth bypass in Extra Innovation Inc. Acmailer Cgi

CVE-2026-70408

An incorrect authorization vulnerability exists in acmailer, which may allow a user to create a sub-account that has administrative privileges.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (36.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-70408: held from 0.003 to 0.004.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-70408?
CVE-2026-70408 is a high-severity vulnerability in Extra Innovation Inc. Acmailer Cgi, classified under Incorrect Authorization. CVSS score: 8.8/10. Published 2026-08-19.
How severe is CVE-2026-70408?
High severity. CVSS v3 base score is 8.8 out of 10.