Threat Intelligence Report — June 26, 2026 | 6 New KEVs · 153 Victims

Report Date: 2026-06-26

New KEVs: 6  ▲ +6 vs last weekRansomware Victims: 153  ▲ +5 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. Threat intelligence sources this period reference Scattered Spider. Ransomware activity is moderate with 153 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-2026-34910 – Ubiquiti UniFi OS | CVSS 10.0 | EPSS 78.6% / 100th pct | PoC Available
   CISA deadline: 2026-06-26 (0d 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.
2. CVE-2026-34909 – Ubiquiti UniFi OS | CVSS 10.0 | EPSS 2.3% / 81th pct | PoC Available
   CISA deadline: 2026-06-26 (0d 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-2026-34908 – Ubiquiti UniFi OS | CVSS 10.0 | EPSS 2.5% / 82th pct | PoC Available
   CISA deadline: 2026-06-26 (0d 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 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
• CVE-2026-12569 – PTC Windchill and FlexPLM | CVSS 9.3 (CRITICAL) | AV: Network | EPSS 0.9% / 56th pct | Ransomware Use: No
• CVE-2026-20230 – Cisco Unified Communications Manager | CVSS 8.6 (HIGH) | AV: Network | EPSS 51.2% / 99th 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.

• CISA ICS AdvisoryAdvisory · yesterday – 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 &lt…
• CISA ICS AdvisoryAdvisory · yesterday – 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 · yesterday – 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…
• Unit 42Incident · today – Threat Brief: Mitigating Large-Scale Credential Attacks
  We provide guidance for preparing for and mitigating large-scale credential attacks, focusing on recent campaigns targeting security vendors' devices. The post Threat Brief: Mitigating Large-Scale Credential Attacks appe…
• Unit 42Incident · yesterday – 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 …
• Sophos X-OpsResearch · 9 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 · 15 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
• Security Affairs (APT)Incident · today – Chinese APT CL-STA-1062 Expands Attacks on Southeast Asian Critical Infrastructure With Custom Malware
  Chinese-speaking APT CL-STA-1062 targeted Southeast Asian government and energy networks open-source tools, and a new TinyRCT backdoor. Palo Alto Networks Unit 42 researchers published a detailed report on a Chinese-spea…
• Security Affairs (APT)News · today – macOS.Gaslight: North Korea-Linked Malware That Tries to Gaslight the Analyst
  macOS.Gaslight: DPRK Rust implant for Mac with a prompt injection payload designed to fool AI-based malware analysts. SentinelLabs researchers spotted a Rust-based macOS implant, dubbed macOS.Gaslight, that surfaced in e…
• Security Affairs (Cybercrime)Incident · today – Third-Party Breach at Polymarket Leads to $2.94M Crypto Theft
  Polymarket confirmed hackers stole funds from some users after attackers injected malicious code through a compromised third-party vendor. Polymarket confirmed that a security breach at a third-party vendor allowed attac…
• Security Affairs (Cybercrime)Incident · yesterday – 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…
• Bleeping ComputerIncident · today – CISA sets urgent deadline to fix Cisco flaw exploited in attacks
  The U.S. Cybersecurity and Infrastructure Security Agency (CISA) is giving federal agencies until Sunday to patch a vulnerability in Cisco Unified Communications Manager Server that is being actively exploited. […]
• The Hacker NewsAdvisory · -1 days ago – FBI Warns Russian Intelligence Hackers Target Signal Backup Recovery Keys
  The FBI and CISA have updated their March warning about Russian intelligence phishing Signal accounts, and the operators have added a step: they now coax targets into handing over their Signal Backup Recovery K…
• Krebs on SecurityNews · 3 days ago – Scattered Spider Hackers Plead Guilty on Day 1 of Trial
  Two men pleaded guilty in the United Kingdom this week to criminal charges stemming from an August 2024 cyberattack that crippled Transport for London, the entity responsible for the public transport network in the Great…
• The RegisterNews · today – Even the Secret Service won't use company-issued phones
  Personal cell phones on protective missions, no threat detection on government-issued devices among the litany of sins

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.

16 new victims posted today
7-day total: 153 via Ransomware.live

Infostealer Exposure: 1,323 employee credentials and 14,698 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.
• 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.
• 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.

Most Targeted Sectors

Top Countries

US (30), DE (7), IN (6), CA (6), BR (6)

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 →
• 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 →
• Omax Autos (Manufacturing · IN) — claimed by Wallstreet. OMAX Autos Limited is a leading manufacturer of sheet metal components, specializing in the production of auto and non-auto components. 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.