WordPress AcyMailing SMTP Newsletter plugin <= 11.0.5 - Remote Code Execution (RCE) vulnerability (CVE-2026-94389) | HOL Guard CVE

Critical · CVSS 9.0CVE-2026-94389

WordPress AcyMailing SMTP Newsletter plugin <= 11.0.5 - Remote Code Execution (RCE) vulnerability

Answer in brief

CVE-2026-94389 records a Critical severity (CVSS 9.0) vulnerability in WordPress AcyMailing SMTP Newsletter plugin <= 11.0.5 - Remote Code Execution (RCE) vulnerability. The current sources do not mark it as known exploited. The current feed maps AcyMailing Newsletter Team/acymailing (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 30, 2026Updated Sep 30, 2026Source checked Sep 30, 2026First seen by HOL Sep 30, 2026Material review Sep 30, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.0
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 9.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps AcyMailing Newsletter Team/acymailing (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
AcyMailing Newsletter Team/acymailinggeneric	>=n/a <=11.0.5	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for AcyMailing Newsletter Team/acymailing.
Review the reported fix. Source-reported solution: Update the WordPress AcyMailing SMTP Newsletter plugin to the latest available version (at least 11.1.0).

Evidence timeline and material changes

Published upstream
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 30, 2026

Sources and claim methodology

Source referencepatchstack.com

Upstream source description

Unauthenticated Remote Code Execution (RCE) in AcyMailing SMTP Newsletter <= 11.0.5 versions.

Quoted source text, attributed separately from HOL analysis.