OpenEFA Daily Threat Brief

April 13, 2026
SANS Threat Level: GREEN

Email Security Overview

1,933
Processed
1,122
Delivered
447
Quarantined
0
Rejected
23.1%
Block Rate
31.4
Avg Score

Threats Blocked by Category

446
Phishing
435
BEC
447
Impersonation
40
Backscatter

Top Spam Origin Countries

CountryBlockedShare
United States (US)23876.3%
The Netherlands (NL)247.7%
Taiwan (TW)185.8%
United Kingdom (GB)185.8%
France (FR)144.5%

Based on emails that reached the content filter. MTA-level blocks (RBL, GeoIP) are not included.

Top Spam Sender Domains

DomainBlockedAvg ScoreVolume
[redacted]2754.8
gmail.com2760.5
optimalhealth.food1669.4
lowes.com1489.9
juliVCB.com9108.0
hotmail.com971.6
outlook.com753.4
karincacivata.com684.2

Notable High-Score Threats

ScoreSenderSubject
251.85DHL Express <info@astspa.cl>DHL On Demand Delivery
243.6DHL Express <info@astspa.cl>DHL On Demand Delivery
239.307"Roundcube Support [redacted]" office@[redacted] Please confirm to conti
230.247"Roundcube Support [redacted].comegan@[redacted] Please confirm to con
218.367"Roundcube Support [redacted]" <wigster@customer.care@[redacted] Please confirm to continu

CISA Known Exploited Vulnerabilities (New)

CVEVendor / ProductRansomware
CVE-2012-1854Microsoft Visual Basic for Applications (VBA)
Microsoft Visual Basic for Applications (VBA) contains an insecure library loading vulnerability that could allow for remote code execution.
Unknown
CVE-2025-60710Microsoft Windows
Microsoft Windows contains a link following vulnerability that allows for privilege escalation
Unknown
CVE-2023-21529Microsoft Exchange Server
Microsoft Exchange Server contains a deserialization of untrusted data that allows an authenticated attacker to achieve remote code execution.
Unknown
CVE-2023-36424Microsoft Windows
Microsoft Windows Common Log File System Driver contains an out-of-bounds read vulnerability that could allow a threat actor for privileges escalation
Unknown
CVE-2020-9715Adobe Acrobat
Adobe Acrobat contains a use-after-free vulnerability that allows for code execution
Unknown
CVE-2026-21643Fortinet FortiClient EMS
Fortinet FortiClient EMS contains a SQL injection vulnerability that may allow an unauthenticated attacker to execute unauthorized code or commands via specifically crafted HTTP requests.
Unknown
CVE-2026-34621Adobe Acrobat and Reader
Adobe Acrobat and Reader contain a prototype pollution vulnerability that allows for arbitrary code execution.
Unknown

Active Malicious URLs (URLhaus)

50
Active URLs
1
Threat Types
1
Unique Hosts

Top threat types:

unknown: 50

Email Threat IOCs (ThreatFox)

20 email-related indicators of compromise in the last 24 hours.

Malware FamilyIOCsSeverity
XWorm8High
Vidar8High
Remvio3Medium
Stealc1Low