CVE-2026-5200Public exploitNetwork attack vector

Administrator takeover via unchecked router authorization

Published May 20, 2026 · Updated May 20, 2026

Missing authorization in AcyMailing 10.8.2 and earlier allows remote authenticated users to take over administrator accounts. The acymailing_router dispatcher executes privileged configuration and subscriber-key export actions without checking the caller's WordPress capability. Subscriber-level access is sufficient, but account takeover also requires knowledge of a target administrator email address.

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

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Missing authorization in AcyMailing 10.8.2 and earlier allows remote authenticated users to take over administrator accounts. The acymailing_router dispatcher executes privileged configuration and subscriber-key export actions without checking the caller's WordPress capability. Subscriber-level access is sufficient, but account takeover also requires knowledge of a target administrator email address.

The record

CVE
CVE-2026-5200
Published
May 20, 2026
Updated
May 20, 2026
Vendor
AcyMailing Newsletter Team
Product
AcyMailing
Classifications
CWE-862, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2026CVE publishedPublication date reported by the CVE source.
  2. May 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <=10.8.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

AcyMailing Newsletter Team · AcyMailingversion=0 <=10.8.2

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1203Exploitation for Client Execution

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo