Threat Intelligence Report
Report Date: 2026-04-17
This report summarizes exploited vulnerabilities, major emerging CVEs, campaign-related activity, and vendor concentration trends observed over the last 7 days.
Top KEVs
Most important exploited vulnerabilities added to the KEV catalog during the reporting window.
- CVE-2026-21643 – Fortinet FortiClient EMS | CVSS 9.8 | Ransomware Use: No
- CVE-2026-34197 – Apache ActiveMQ | CVSS 8.8 | Ransomware Use: No
- CVE-2009-0238 – Microsoft Office | CVSS 8.8 | Ransomware Use: No
- CVE-2023-21529 – Microsoft Exchange Server | CVSS 8.8 | Ransomware Use: No
- CVE-2026-34621 – Adobe Acrobat and Reader | CVSS 8.6 | Ransomware Use: No
- CVE-2012-1854 – Microsoft Visual Basic for Applications (VBA) | CVSS 7.8 | Ransomware Use: No
- CVE-2025-60710 – Microsoft Windows | CVSS 7.8 | Ransomware Use: No
Major CVEs
No major non-KEV CVEs met the current threshold during the reporting window.
Active Campaigns
Recent campaign-oriented activity and advisory content from selected threat and advisory sources.
- SANS ISC – ISC Stormcast For Friday, April 17th, 2026 https://isc.sans.edu/podcastdetail/9896, (Fri, Apr 17th)
- SANS ISC – Lumma Stealer infection with Sectop RAT (ArechClient2), (Fri, Apr 17th)
Introduction - SANS ISC – [Guest Diary] Compromised DVRs and Finding Them in the Wild, (Thu, Apr 16th)
[This is a Guest Diary by Alec Jaffe, an ISC intern as part of the SANS.edu Bachelor's Degree in Applied Cybersecurity (BACS) program &#&… - SANS ISC – ISC Stormcast For Thursday, April 16th, 2026 https://isc.sans.edu/podcastdetail/9894, (Thu, Apr 16th)
- SANS ISC – ISC Stormcast For Wednesday, April 15th, 2026 https://isc.sans.edu/podcastdetail/9892, (Wed, Apr 15th)
Vendor-Specific Risks
Vendors showing the strongest concentration of exploited vulnerabilities, major CVEs, or campaign mentions.
- Microsoft – KEVs: 4, Major CVEs: 0, Campaign Mentions: 0
- Fortinet – KEVs: 1, Major CVEs: 0, Campaign Mentions: 0
- Adobe – KEVs: 1, Major CVEs: 0, Campaign Mentions: 0
- Apache – KEVs: 1, Major CVEs: 0, Campaign Mentions: 0