Vulnerability · Published Aug 19, 2026 · Assigned by jpcert
CVE-2026-66358
Medium 6.1
In plain English
A medium-severity cross-site scripting in acmailer CGI from Extra Innovation Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).
Severity (CVSS 3.0)6.1Medium
Exploit odds (30 days)0.3%top 81.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A cross-site scripting vulnerability exists in acmailer, which may allow an attacker to execute an arbitrary script.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Extra Innovation Inc. | acmailer CGI | 0 – before 4.1.2 |
| Extra Innovation Inc. | acmailer DB | 0 – before 1.2.2 |
Weakness: CWE-79 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N