Report Date: 2026-06-28
New KEVs: 6 ▲ +6 vs last weekRansomware Victims: 114 ▼ -94 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 Turla (Russia). Ransomware activity is moderate with 114 new victims posted to leak sites over the last 7 days, with Stormous 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 (overdue by 2d) — 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 (overdue by 2d) — 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 (overdue by 2d) — 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 1.1% / 62th pct | Ransomware Use: No
- CVE-2026-20230 – Cisco Unified Communications Manager | CVSS 8.6 (HIGH) | AV: Network | EPSS 41.7% / 98th 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.
Threat Actors Mentioned
Turla (Russia)
- CISA ICS AdvisoryAdvisory · 3 days ago – 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 · 3 days ago – 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 · 3 days ago – 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 · 3 days ago – 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 · 4 days ago – 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 · 2 days ago – 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 · 3 days ago – 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 · 11 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 · 17 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 RecordIncident · 2 days ago – Turla group adds more malware to Russiaâs espionage efforts against Ukraine
Threat intelligence researchers at Google described StockStay, the latest malware developed by the Russian cyber-espionage group known as Turla. - The RecordIncident · 2 days ago – Russia used social engineering to breach prominent messaging accounts, Ukraine says
Ukraine's SBU described a long-running Russian operation that used fake tech-support workers to persuade people to hand over credentials to their messaging apps. - Security Affairs (APT)Incident · 2 days ago – 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 · 2 days ago – 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 – KDDI Data Breach Impacts up to 14.2 Million Email Accounts at Six ISPs
KDDI Corporation disclosed a breach affecting up to 14.2 million email accounts after attackers exploited a vulnerability in third-party software. KDDI Corporation disclosed a data breach that exposed up to 14.2 million … - Security Affairs (Cybercrime)Incident · 2 days ago – 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…
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.
29 new victims posted today
7-day total: 114 via Ransomware.live
Infostealer Exposure: 4,582 employee credentials and 37,706 user credentials compromised via infostealer malware across victim organisations — indicating credential theft likely preceded these ransomware deployments.
Most Active Groups
Group Intelligence
- Stormous — Stormous is an Arabic-speaking, pro-Russian ransomware and hacktivist group active since at least 2022, known for politically motivated attacks across 15+ countries, collaborating with GhostSec on the GhostLocker 2.0 RaaS platform and inheriting GhostSec's RaaS operations in mid-2024.
- 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.
Most Targeted Sectors
Top Countries
US (30), DE (8), IN (6), CA (5), MX (3)
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 →
- 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 →
- gov.br (Public Sector · BR) — claimed by Apt73. Gov.br — this is the official state digital platform and domain zone of the Brazilian Federal G… 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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