What is CVE-2026-66689?

CVE-2026-66689 is a medium-severity vulnerability in Acymailing Newsletter Team Anti Spam And List Cleaner – Acychecker, classified under Missing Authorization. CVSS score: 6.3/10. Published 2026-08-13.

How severe is CVE-2026-66689?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Auth bypass in Acymailing Newsletter Team Anti Spam And List Cleaner – Acychecker

CVE-2026-66689

Unauthenticated Broken Access Control in Anti Spam and list cleaner – AcyChecker <= 2.0.0 versions.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

Affected products

Acymailing Newsletter Team Anti Spam And List Cleaner – Acychecker — versions n/a

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-66689?: CVE-2026-66689 is a medium-severity vulnerability in Acymailing Newsletter Team Anti Spam And List Cleaner – Acychecker, classified under Missing Authorization. CVSS score: 6.3/10. Published 2026-08-13.
How severe is CVE-2026-66689?: Medium severity. CVSS v3 base score is 6.3 out of 10.

Auth bypass in Acymailing Newsletter Team Anti Spam And List Cleaner &#8211; Acychecker