Threat Intelligence Report — June 24, 2026 | 5 New KEVs · 168 Victims

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Report Date: 2026-06-24

New KEVs: 5  ▲ +5 vs last weekRansomware Victims: 168  ▼ -19 vs last week

5 vulnerabilities were added to the CISA Known Exploited Vulnerabilities catalog this period. Ubiquiti products show the strongest concentration of risk signals this week. Ransomware activity is moderate with 168 new victims posted to leak sites over the last 7 days, with Lockbit5 posting the most victims.

Patch This Week

The top 3 KEVs to remediate right now, ranked by CISA deadline proximity, ransomware exploitation, and severity. These are confirmed exploited — if you do nothing else today, patch these.

  1. CVE-2026-20253 – Splunk Enterprise | CVSS 9.8 | EPSS 92.1% / 100th pct | PoC Available
    CISA deadline: 2026-06-21 (overdue by 3d) — Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
  2. CVE-2026-34910 – Ubiquiti UniFi OS | CVSS 10.0 | EPSS 81.8% / 100th pct | PoC Available
    CISA deadline: 2026-06-26 (2d remaining) — Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
  3. CVE-2026-34909 – Ubiquiti UniFi OS | CVSS 10.0 | EPSS 1.8% / 76th pct | PoC Available
    CISA deadline: 2026-06-26 (2d remaining) — Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Top KEVs

Vulnerabilities confirmed actively exploited in the wild by CISA — ranked by ransomware use, then severity. Patch these before anything else.

This Reporting Window

  • CVE-2026-34910 – Ubiquiti UniFi OS | CVSS 10.0 (CRITICAL) | AV: Network | EPSS 81.8% / 100th pct | Ransomware Use: No | PoC Available
  • CVE-2026-34909 – Ubiquiti UniFi OS | CVSS 10.0 (CRITICAL) | AV: Network | EPSS 1.8% / 76th pct | Ransomware Use: No | PoC Available
  • CVE-2026-34908 – Ubiquiti UniFi OS | CVSS 10.0 (CRITICAL) | AV: Network | EPSS 2.1% / 79th pct | Ransomware Use: No | PoC Available
  • CVE-2025-67038 – Lantronix EDS5000 | CVSS 9.8 (CRITICAL) | AV: Network | EPSS 1.1% / 62th pct | Ransomware Use: No
  • CVE-2026-20253 – Splunk Enterprise | CVSS 9.8 (CRITICAL) | AV: Network | EPSS 92.1% / 100th pct | Ransomware Use: No | PoC Available

Security News

Advisories, threat research, and incident reports from 12 sources across government, commercial research, and security journalism — prioritized by source credibility.

Ransomware Activity

Victim counts posted to ransomware group leak sites — use this to gauge which groups are most active and which sectors and regions are being targeted.

19 new victims posted today
7-day total: 168 via Ransomware.live

Infostealer Exposure: 1,306 employee credentials and 14,387 user credentials compromised via infostealer malware across victim organisations — indicating credential theft likely preceded these ransomware deployments.

Most Active Groups

Lockbit5 33 Qilin 18 Nova 15 Thegentlemen 13 Icarus 10

Group Intelligence

  • Lockbit5 — LockBit 5.0 ("ChuongDong") emerged in September 2025 as the group's resurgence following the February 2024 law enforcement takedown, introducing cross-platform payloads targeting Windows, Linux, and VMware ESXi with enhanced evasion capabilities and continuing the RaaS affiliate model of its predecessors.
  • Qilin — Qilin ransomware was first observed in July of 2022. Qilin Ransomware is written in Golang and supports multiple encryption modes; all of which are controlled by the operator. Qilin actors practice double extortion – demanding payment for a decryptor, as well as for the non-release of stolen data.
  • Nova — Nova (formerly RALord) is a ransomware-as-a-service (RaaS) group that encrypts victims’files and uses double-extortion tactics to pressure organizations into paying for decryption and data non-disclosure.
  • Thegentlemen — The Gentlemen is a RaaS group that emerged in July–August 2025, rapidly claiming over 320 victims across 17+ countries by offering affiliates a 90% revenue share, deploying a Go-based locker against Windows, Linux, NAS, and BSD systems; a compromised C2 server in 2026 revealed more than 1,570 linked victims.

Most Targeted Sectors

Business Services 26 Manufacturing 16 Consumer Services 13 Technology 11 Healthcare 10

Top Countries

US (34), BR (8), DE (8), CA (7), MX (5)

Notable Incidents

  • Central Bank of Libya (Financial Services · LY) — claimed by Qilin. N/A Press coverage →
  • Reynella East College (Not Found · AU) — claimed by Interlock. Reynella East College is an innovative educational institution offering a comprehensive curriculum for students from preschool to 12th grade. However, the school failed to adequately protect the privacy of its students a… Press coverage →
  • Commune d'Eyguires (Public Sector · FR) — claimed by Qilin. N/A Press coverage →
  • sra.nl (Business Services · NL) — claimed by Lockbit5. With this new dossier, SRA helps you make inclusivity practical, with extra attention to neurodiverg… Press coverage →
  • daikyonishikawa.co.jp (Agriculture and Food Production · JP) — claimed by Lockbit5. DaikyoNishikawa Corporation (DNC) is a comprehensive, proposal-based plastic products manufacturer a… Press coverage →

Vendor-Specific Risks

Vendors with confirmed KEV exploitation this week — the stacked bar shows how that exposure breaks down across exploited CVEs (red), critical CVEs to watch (orange), and news mentions (yellow). Prioritize patching vendors with the largest red segment.

Ubiquiti 3 Lantronix 1 Splunk 1 KEVs CVEs Mentions

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