CVE-2026-15426Network attack vector

Administrator takeover via unauthorized notification template update

Published Aug 11, 2026 · Updated Aug 11, 2026

Authorization bypass in AcyMailing 10.11.1 and earlier allows remote authenticated users to capture WordPress password-reset emails. The notification-template edition path accepts a subscriber's update to the acy_notification_cms BCC field without an administrative capability check, so later reset messages are copied to the supplied address. Subscriber-level access is sufficient only when an administrator has enabled "Send website emails with AcyMailing"; a captured administrator reset link enables account takeover.

CVSS severity8.8
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in AcyMailing 10.11.1 and earlier allows remote authenticated users to capture WordPress password-reset emails. The notification-template edition path accepts a subscriber's update to the acy_notification_cms BCC field without an administrative capability check, so later reset messages are copied to the supplied address. Subscriber-level access is sufficient only when an administrator has enabled "Send website emails with AcyMailing"; a captured administrator reset link enables account takeover.

The record

CVE
CVE-2026-15426
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
AcyMailing Newsletter Team
Product
AcyMailing
Classifications
CWE-269, T1114
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=10.11.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

AcyMailing Newsletter Team · AcyMailingversion=0 <=10.11.1

Published CVSS scores

8.8WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1114Email Collection

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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