Report Date: 2026-06-25
New KEVs: 6 ▲ +6 vs last weekRansomware Victims: 156 ▼ -7 vs last week
6 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 156 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.
- CVE-2026-34910 – Ubiquiti UniFi OS | CVSS 10.0 | EPSS 78.6% / 100th pct | PoC Available
CISA deadline: 2026-06-26 (1d 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. - CVE-2026-34909 – Ubiquiti UniFi OS | CVSS 10.0 | EPSS 2.3% / 81th pct | PoC Available
CISA deadline: 2026-06-26 (1d 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. - CVE-2026-34908 – Ubiquiti UniFi OS | CVSS 10.0 | EPSS 2.5% / 82th pct | PoC Available
CISA deadline: 2026-06-26 (1d 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.
New Today
- CVE-2026-12569 – PTC Windchill and FlexPLM | CVSS 9.3 (CRITICAL) | AV: Network | EPSS 0.5% / 39th pct | Ransomware Use: No
- CVE-2026-20230 – Cisco Unified Communications Manager | CVSS 8.6 (HIGH) | AV: Network | EPSS 34.2% / 98th pct | Ransomware Use: No
Still Outstanding
- CVE-2026-34910 – Ubiquiti UniFi OS | CVSS 10.0 (CRITICAL) | AV: Network | EPSS 78.6% / 100th pct | Ransomware Use: No | PoC Available
- CVE-2026-34909 – Ubiquiti UniFi OS | CVSS 10.0 (CRITICAL) | AV: Network | EPSS 2.3% / 81th pct | Ransomware Use: No | PoC Available
- CVE-2026-34908 – Ubiquiti UniFi OS | CVSS 10.0 (CRITICAL) | AV: Network | EPSS 2.5% / 82th 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
Security News
Advisories, threat research, and incident reports from 12 sources across government, commercial research, and security journalism — prioritized by source credibility.
- CISA ICS AdvisoryAdvisory · today – Horner Automation Cscape
View CSAF Summary Successful exploitation of this vulnerability could allow a local attacker to disclose information and execute arbitrary code. The following versions of Horner Automation Cscape are affected: Cscape <… - CISA ICS AdvisoryAdvisory · today – Daktronics Controller Firmware
View CSAF Summary Successful exploitation of these vulnerabilities could could provide an unauthenticated user with complete root-level access and control of the system. The following versions of Daktronics Controller Fi… - CISA ICS AdvisoryAdvisory · today – EVoke Systems Charging Station Management System
View CSAF Summary Successful exploitation of these vulnerabilities could enable attackers to gain unauthorized administrative control over vulnerable charging stations or disrupt charging services through denial-of-servi… - SANS ISCResearch · today – What do Ports Hear When Nobody's Listening? An Assessment of Automated Cybercrime [Guest Diary], (Wed, Jun 24th)
[This is a Guest Diary by Nicole Phillips, an ISC intern as part of the SANS.edu BACS program]
 - SANS ISCResearch · yesterday – Linux Process Name Masquerading, (Wed, Jun 24th)
In a previous diary, I talked about stack strings&#;x26;#;x5b;1&#;x26;#;x5d; with a practical example of them. Since my SEC670 class, I&#;x26;#&#x… - Unit 42Incident · today – CL-STA-1062 Targets Southeast Asian Governments and Critical Infrastructure
Government entities and critical infrastructure were targeted for espionage in SE Asia by attackers using a hybrid toolkit, including custom TinyRCT backdoor. The post CL-STA-1062 Targets Southeast Asian Governments and … - Unit 42Research · 2 days ago – OpenClaw’s Skill Marketplace and the Emerging AI Supply Chain Threat
Unit 42's analysis of ClawHub revealed evasive malicious skills bypassing automated scanners to deploy infostealers and execute agentic financial fraud. The post OpenClaw’s Skill Marketplace and the Emerging AI Supply Ch… - Sophos X-OpsResearch · 8 days ago – AI in the underground: Curiosity, claims, and concerns
Amid discussions about how artificial intelligence can facilitate cybercrime, some threat actors remain skeptical Categories: Threat Research Tags: AI, Dark Web, underground - Sophos X-OpsResearch · 14 days ago – June Patch Tuesday smashes past 500-CVE mark
209 patches + 388 advisories = welcome to summer 2026 Categories: Threat Research Tags: x-ops, Patch Tuesday, MICROSOFT PATCH TUESDAY - The RecordNews · today – Another Russian dairy company reportedly disrupted by cyberattack
A dairy products manufacturer in Russia's republic of Bashkortostan is the latest such company to have its operations snarled by a cyberattack. - The RecordNews · today – Ukraine's state postal operator reports app disruption after cyberattack
Ukraine's state-owned postal operator said it was experiencing disruptions to some of its app services due to a suspected cyberattack, but did not say who was behind it. - Security Affairs (APT)News · 8 days ago – China-Linked FishMonger Ports SprySOCKS to Windows With Kernel-Level Stealth and UEFI Bootkit Hints
China-linked FishMonger used two SprySOCKS Windows variants that leveraged kernel drivers and the Print Spooler to target governments in four countries. ESET researchers have found two previously undocumented Windows ver… - Security Affairs (APT)News · 9 days ago – China-linked actor spent two years inside medical research networks
China’s UNC6508 hid in North American medical research networks for 2 years, stealing credentials and forwarding emails to Gmail Google’s Threat Intelligence Group published a report this week on UNC6508, a C… - Security Affairs (Cybercrime)Incident · today – Tata Electronics Confirms Data Breach After 630GB Leak Claim Targets Apple and Tesla
Tata Electronics confirmed a data breach after hackers claimed to steal 630GB of data, including alleged Apple supplier and Tesla documents. Tata Electronics, a major supplier to Apple and Tesla, has confirmed a cybersec… - Security Affairs (Cybercrime)News · today – Inside Mistic, the New Stealth Backdoor in Ransomware Intrusions
Mistic is a stealthy backdoor used by KongTuke-linked actors to keep long-term access in ransomware-targeted networks. Mistic is the kind of backdoor that tells you the operator wants time, not noise. Symantec security r…
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.
12 new victims posted today
7-day total: 156 via Ransomware.live
Infostealer Exposure: 1,305 employee credentials and 14,404 user credentials compromised via infostealer malware across victim organisations — indicating credential theft likely preceded these ransomware deployments.
Most Active Groups
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.
- 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.
- 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.
- 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
Top Countries
US (22), BR (8), DE (7), 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.
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