Auth bypass in Acymailing Newsletter Team Smtp

CVE-2026-28181

Subscriber Broken Access Control in AcyMailing SMTP Newsletter <= 10.11.1 versions.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (24.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.9% 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-2026-28181: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-28181?
CVE-2026-28181 is a medium-severity vulnerability in Acymailing Newsletter Team Smtp, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-08-13.
How severe is CVE-2026-28181?
Medium severity. CVSS v3 base score is 6.5 out of 10.