Is CVE-2026-57740 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-57740 being exploited in the wild.

How severe is CVE-2026-57740?

High severity, with a CVSS score of 7.1, published 13 July 2026.

Which products and versions are affected?

AcyMailing Newsletter Team AcyMailing SMTP Newsletter <= 10.11.1.

Is there a fix for CVE-2026-57740?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-57740 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-57740?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-57740: AcyMailing SMTP Newsletter missing authorization in access control

Q: Is there a fix for CVE-2026-57740?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

Q: How is CVE-2026-57740 attacked?

It is attacked over the network, in a web application.

Q: Am I affected by CVE-2026-57740?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-57740 · Severity: high · CVSS 7.1 · Published 2026-07-13

AcyMailing SMTP Newsletter, a popular WordPress plugin used for managing email marketing and newsletters, contains a security flaw in its access control settings. This vulnerability allows logged-in users with low-level permissions, such as subscribers, to perform actions they should not be authorized to do. An exploit could lead to unauthorized changes to the newsletter system or cause service disruptions, potentially impacting the organization's ability to communicate with customers.

Quick answers

Is CVE-2026-57740 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-57740 being exploited in the wild.
How severe is CVE-2026-57740?: High severity, with a CVSS score of 7.1, published 13 July 2026.
Which products and versions are affected?: AcyMailing Newsletter Team AcyMailing SMTP Newsletter <= 10.11.1.
Is there a fix for CVE-2026-57740?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-57740 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-57740?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A missing authorization vulnerability (CWE-862) exists in the AcyMailing SMTP Newsletter plugin for WordPress through version 10.11.1. The flaw stems from insufficient validation of user permissions when accessing certain functions or security levels. A remote attacker with 'Subscriber' level privileges can exploit this to execute actions typically reserved for higher-privileged users. According to the advisory, the impact includes integrity loss and high availability impact, suggesting the ability to modify configurations or disrupt newsletter services. As of the disclosure date, no official patch has been released.

Affected products

AcyMailing Newsletter Team AcyMailing SMTP Newsletter <= 10.11.1

Timeline

2026-05-02: disclosed: Vulnerability reported by researcher anhcd05
2026-07-06: advisory: Patchstack published the vulnerability details
2026-07-13: advisory: CVE published in the National Vulnerability Database (NVD)

References

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