Report Date: 2026-05-26
New KEVs: 7Ransomware Victims: 124
7 vulnerabilities were added to the CISA Known Exploited Vulnerabilities catalog this period. Microsoft products show the strongest concentration of risk signals this week. Threat intelligence sources this period reference Lazarus Group (DPRK) and MuddyWater (Iran). Ransomware activity is moderate with 124 new victims posted to leak sites over the last 7 days, with Qilin 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-2026-9082 – Drupal Core | CVSS 9.8 | EPSS 17.3% / 95th pct
CISA deadline: 2026-05-27 (1d remaining) — Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. - CVE-2026-48172 – LiteSpeed cPanel Plugin | CVSS 10.0 | EPSS 0.0% / 3th pct
CISA deadline: 2026-05-29 (3d remaining) — Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. - CVE-2008-4250 – Microsoft Windows | CVSS 9.8 | EPSS 92.1% / 100th pct | PoC Available
CISA deadline: 2026-06-03 (8d remaining) — Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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-2026-48172 – LiteSpeed cPanel Plugin | CVSS 10.0 (CRITICAL) | AV: Network | EPSS 0.0% / 3th pct | Ransomware Use: No
Still Outstanding
- CVE-2026-9082 – Drupal Core | CVSS 9.8 (CRITICAL) | AV: Network | EPSS 17.3% / 95th pct | Ransomware Use: No
- CVE-2008-4250 – Microsoft Windows | CVSS 9.8 (CRITICAL) | AV: Network | EPSS 92.1% / 100th pct | Ransomware Use: No | PoC Available
- CVE-2025-34291 – Langflow Langflow | CVSS 9.4 (CRITICAL) | AV: Network | EPSS 30.4% / 97th pct | Ransomware Use: No | PoC Available
- CVE-2009-1537 – Microsoft DirectX | CVSS 8.8 (HIGH) | AV: Network | EPSS 53.0% / 98th pct | Ransomware Use: No
- CVE-2009-3459 – Adobe Acrobat and Reader | CVSS 8.8 (HIGH) | AV: Network | EPSS 88.1% / 100th pct | Ransomware Use: No
- CVE-2010-0249 – Microsoft Internet Explorer | CVSS 8.8 (HIGH) | AV: Network | EPSS 88.7% / 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.
Threat Actors Mentioned
Lazarus Group (DPRK)MuddyWater (Iran)
- CISA ICS AdvisoryAdvisory · today – ABB AC500 V2
View CSAF Summary ABB became aware of vulnerabilities in AC500 V2 listed as affected in the advisory. An attacker who successfully exploited this vulnerability could access fragments of Modbus telegrams that have been se… - CISA ICS AdvisoryAdvisory · today – ABB Terra AC
View CSAF Summary ABB is aware of vulnerabilities in the product versions listed as affected in the advisory. An attacker who successfully exploited this vulnerability could cause the pollution of heap memory which poten… - CISA ICS AdvisoryAdvisory · today – ABB Ability Camera Connect
View CSAF Summary ABB is aware of public reports of vulnerabilities in a 3rd party component VLC media player Version 2.2.4 which was delivered together with the installation package of Camera Connect Version 1.5.0.14 an… - Unit 42Incident · 4 days ago – Tracking Iranian APT Screening Serpens’ 2026 Espionage Campaigns
Unit 42 details Screening Serpens' use of AppDomainManager hijacking and new RAT variants to target tech and defense sectors in recent campaigns. The post Tracking Iranian APT Screening Serpens’ 2026 Espionage Campaigns … - Unit 42Research · 4 days ago – Paved With Intent: ROADtools and Nation-State Tactics in the Cloud
Open-source framework ROADtools is being misused by threat actors for cloud intrusions. Learn how to identify its malicious use. The post Paved With Intent: ROADtools and Nation-State Tactics in the Cloud appeared first … - Sophos X-OpsIncident · 6 days ago – GitHub internal repositories breached
<p>A malicious VS Code extension led to cloned private repositories, reportedly offered for sale on a criminal forum</p> Categories: Threat Research Tags: GitHub, Supply chain - Sophos X-OpsResearch · 7 days ago – WantToCry ransomware remotely encrypts files
Brute-force attempts against SMB services can be early signs of an attack Categories: Threat Research Tags: Ransomware, WantToCry, SMB - The RecordNews · today – Lithuania investigates theft of 600,000 state registry records by foreign actor
The Lithuanian Prosecutor Generalâs Office said Friday that attackers gained unauthorized access to more than 600,000 records managed by the Centre of Registers, the state agency responsible for handling property and l… - The RecordIncident · yesterday – Dutch authorities arrest men suspected of providing infrastructure for Russian cyber operations
Investigators seized more than 800 servers as they arrested two men suspected of violating European sanctions and assisting pro-Russian cyberattacks and disinformation campaigns. - Security Affairs (APT)Incident · today – Nimbus Manticore Expanded Attacks With AI-Assisted Malware and Fake Zoom Installers
Nimbus Manticore accelerated cyberattacks during wartime, using AI-assisted malware, fake Zoom installers, and SEO poisoning. When the United States launched Operation Epic Fury against Iran at the end of February 2026, … - Security Affairs (APT)News · today – Lazarus APT unveils fileless remote access Trojan designed to evade detection
North Korea-linked Lazarus APT Group is using a stealthy memory-only RAT that leaves almost no forensic traces behind. North Korea-linked APT group Lazarus has never been shy about its ambitions, the threat actor has bee… - Security Affairs (Cybercrime)Incident · today – The Hidden Ransomware Economy Running on Exposed Databases
A 5-year study on the Ransomware Economy found that 30,515 exposed databases were hit by ransom attacks, causing massive damage despite victims never paying. Database extortion doesn’t look like the ransomware stories th… - Security Affairs (Cybercrime)Incident · today – Malware Found in Laravel-Lang Composer Packages After Git Tag Poisoning Attack
Attackers have poisoned four Laravel-Lang Composer packages by rewriting hundreds of Git tags, putting many Laravel apps at risk. Hackers compromised four popular Laravel-Lang Composer packages and injected malware by re… - Bleeping ComputerNews · today – KnowledgeDeliver flaw exploited as a zero-day to install web shells
Hackers exploited a critical zero-day vulnerability in a server running the KnowledgeDeliver learning management system (LMS) to deploy the Godzilla web shell. […] - The Hacker NewsIncident · today – MuddyWater Uses DLL Side-Loading in Espionage Campaign Targeting 9 Countries
The Iranian hacking group known as MuddyWater has been linked to a new campaign affecting at least nine organizations across nine countries on four continents in the first quarter of 2026. The activity targeted industria…
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: 124 via Ransomware.live
Infostealer Exposure: 1,053 employee credentials and 56,413 user credentials compromised via infostealer malware across victim organisations — indicating credential theft likely preceded these ransomware deployments.
Most Active Groups
Group Intelligence
- 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.
- Dragonforce — DragonForce is a major ransomware-as-a-service operation first observed in August 2023 that launched a formal affiliate program offering 80% revenue share, then rebranded as a "ransomware cartel" in 2025, gaining notoriety for high-profile attacks on UK retailers Marks & Spencer, Co-op, and Harrods.
- 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.
- 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.
- Nightspire — NightSpire is a ransomware group that first emerged in March 2025 and rapidly claimed over 250 victims across retail, manufacturing, healthcare, finance, and education sectors in the US, France, India, Taiwan, and Japan, using aggressive double-extortion with ransom deadlines as short as two days.
Most Targeted Sectors
Top Countries
US (40), CA (6), ES (6), GB (6), TR (5)
Notable Incidents
- University of Valencia (Education · ES) — claimed by Nova. University of Valencia is a university located in the Spanish city of Valencia. It is one of the oldest surviving universities in Spain, and the oldest in the Valencian Community, and is regarded as one of Spain's leadin… Press coverage →
- saver.nl (Consumer Services · NL) — claimed by Dragonforce. Saver NV operates in waste management, environmental services, and recycling. It employs 20 to 49 people and generates revenues of $5 to $10 million. The company is headquartered in Roosendaal, Noord-Brabant, the Netherl… 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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