CVE-2026-70408 Missing authorization in acmailer CGI
Attackers can create sub-accounts with administrative privileges due to incorrect authorization checks in acmailer.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-70408?
CVE-2026-70408 is a high-severity missing authorization vulnerability in Extra Innovation Inc. acmailer CGI, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An incorrect authorization vulnerability exists in acmailer, which may allow a user to create a sub-account that has administrative privileges.
Weakness: CWE-863
Which versions are affected by CVE-2026-70408?
How do I fix CVE-2026-70408?
No fix has been published for CVE-2026-70408 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-70408 being exploited?
There is no known exploitation of CVE-2026-70408 in the wild and no public exploit code.
Sources
Also known as GHSA-w4h6-h99g-8xhr.