What it is
CVE-2026-57739 is an unauthenticated vulnerability affecting AcyMailing Newsletter Team AcyMailing SMTP Newsletter. Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in...
Vulnerability report
Active exploitation observed
Confirmed confidence
Not in CISA KEV
CVE-2026-57739
AcyMailing SMTP Newsletter SQL Injection
AcyMailing Newsletter Team / AcyMailing SMTP Newsletter · 0 to <= 10.11.0
- Severity
- CVSS 9.3 · Critical
- Confidence
- Confirmed
- Exploit status
- Observed in sensors
- EPSS
- 0.4%
- First observed
- 22 Aug 2026
- Last observed
- 24 Aug 2026
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. Previdian sensors observed exploitation attempts with confirmed confidence.
Who is affected?
AcyMailing Newsletter Team / AcyMailing SMTP Newsletter 0 to <= 10.11.0.
What should we do?
Patch immediately, validate internet-facing exposure, and monitor for matching requests.
Overview
AcyMailing SMTP Newsletter SQL Injection
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in AcyMailing Newsletter Team AcyMailing SMTP Newsletter acymailing allows Blind SQL Injection.This issue affects AcyMailing SMTP Newsletter: from n/a through <= 10.11.0.
Vendor
Product
Affected
Status
- Published
- 13 Jul 2026
- Exploitation Reported
- 22 Aug 2026
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- None
- User interaction
- None
Tags
wordpress
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-57739
- VDB Entry — patchstack.com patchstack.com · VDB Entry https://patchstack.com/database/Wordpress/Plugin/acymailing/vulnerabi...
Exploitation evidence
Why Previdian marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
Previdian
Independent exploitation attestation added to the Previdian record.
Active exploitation observed
Previdian sensor
First-party sensor telemetry confirms matching exploitation attempts.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the Previdian Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| Previdian First | 2026-08-22 16:39 UTC |
Operational indicators for this CVE are listed under Detection.
Sensor telemetry
First-party evidence of exploitation activity
Aggregate observations show the scale, recency, and distribution of activity without overstating sparse data.
878
Attempts observed
14
Unique attacker IPs
4
Attacker countries
BG · NL · SE · US
15
Sensors observed
Exploitation attempts over the last 7 days
Daily events observed by Previdian sensors
Updated 25 Aug 2026
19 Aug
20 Aug
21 Aug
22 Aug
23 Aug
24 Aug
25 Aug
First observed 22 Aug 2026 · Last observed 24 Aug 2026
Pro adds sensor region and window summaries. Enterprise adds raw IPs, paths, User-Agents, and payloads.
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 42
- User-Agents
- 1
Raw values available in Pro and Enterprise.
Scanner coverage
No scanner integrations recorded yet.
Virtual patch status
No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →Attacker IP Indicators
Attacker IP indicators observed · available in Pro and Enterprise.
Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.
Learn about Pro API accessRisk and context
Severity, weaknesses, and research context
CVSS v3.1
9.3
Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
EPSS
0.4%
Timeline
From disclosure to observed exploitation
-
Observed by Previdian sensors
Evidence-backed exploitation signal
-
Indicators of compromise added (14)
Indicators of compromise recorded
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2026-57739
Free JSON includes basic KEV fields{
"cve_id": "CVE-2026-57739",
"confidence": "Confirmed",
"cvss_score": 9.3,
"cvss_estimated": false,
"epss_score": 0.004,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": true
},
"sensor_telemetry": { "attempts": 878, "sensors": 15 }
}Early warning alerts
Get alerts on high-impact exploitation
Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.