Report Date: 2026-10-09
New KEVs: 6 ▲ +1 vs last weekRansomware Victims: 151 ▼ -73 vs last week
6 vulnerabilities were added to the CISA Known Exploited Vulnerabilities catalog this period. Citrix products show the strongest concentration of risk signals this week. Threat intelligence sources this period reference Flax Typhoon (China). Ransomware activity is moderate with 151 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-2026-88779 – Citrix NetScaler | CVSS 8.7 | EPSS 0.6% / 47th pct
CISA deadline: 2026-10-07 (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-2015-3306 – ProFTPD ProFTPD | CVSS 10.0 | EPSS 96.8% / 100th pct | PoC Available
CISA deadline: 2026-10-11 (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. - CVE-2021-3199 – ONLYOFFICE Docs | CVSS 9.8 | EPSS 8.2% / 95th pct | PoC Available
CISA deadline: 2026-10-11 (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-2015-3306 – ProFTPD ProFTPD | CVSS 10.0 (CRITICAL) | AV: Network | EPSS 96.8% / 100th pct | Ransomware Use: No | PoC Available
- CVE-2021-3199 – ONLYOFFICE Docs | CVSS 9.8 (CRITICAL) | AV: Network | EPSS 8.2% / 95th pct | Ransomware Use: No | PoC Available
- CVE-2026-88779 – Citrix NetScaler | CVSS 8.7 (HIGH) | AV: Network | EPSS 0.6% / 47th pct | Ransomware Use: No
- CVE-2016-3081 – Apache Struts | CVSS 8.1 (HIGH) | AV: Network | EPSS 93.4% / 100th pct | Ransomware Use: No | PoC Available
- CVE-2015-5477 – ISC BIND | CVSS 7.5 (HIGH) | AV: Network | EPSS 91.3% / 100th pct | Ransomware Use: No
- CVE-2023-22894 – Strapi Strapi | CVSS 4.9 (MEDIUM) | AV: Network | EPSS 1.7% / 76th 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
Flax Typhoon (China)
- CISA ICS AdvisoryAdvisory · yesterday – Satel Netco Design
View CSAF Summary Successful exploitation of these vulnerabilities could allow an attacker to execute arbitrary scripts in a user's browser, consume excessive system resources, enumerate files, create or modify files, an… - CISA ICS AdvisoryAdvisory · yesterday – Grid Protection Alliance openPDC and openHistorian
View CSAF Summary The following versions of Grid Protection Alliance openPDC and openHistorian are affected: openPDC <2.9.477, <2.9.482 (CVE-2026-104629, CVE-2026-100730, CVE-2026-105281, CVE-2026-85479, CVE-2026-1… - CISA ICS AdvisoryAdvisory · yesterday – Red Lion Controls N-Tron 700 Series
View CSAF Summary Successful exploitation of these vulnerabilities could allow a malicious user to access the device and gain administrative access. This access would allow the user to view, edit, and upload configuratio… - SANS ISCIncident · yesterday – Reconstructing AI Agent Activity: Two New Scripts for Forensic Review, (Thu, Oct 8th)
We just did a major update to FOR577 and added a lot of new material on day 5 about investigating AI usage in incident response. In the new material we dicsuss 8&#;x26;#;xc2;&#;x26&#x… - SANS ISCResearch · 2 days ago – Scans for Atlassian vulnerablity (CVE-2026-21589), (Wed, Oct 7th)
On October 5th, Atlassian published patches&#;x26;#;xc2;&#;x26;#;xa0;for multiple products to fix an "Arbitrary File Access" vulnerability &#;x26;… - Unit 42Incident · 2 days ago – Evolution of Web3 in Cloud Supply Chain Attacks
Unit 42 details how threat actors leverage Web3 infrastructure and open-source supply chain attacks to breach enterprise cloud environments The post Evolution of Web3 in Cloud Supply Chain Attacks appeared first on Unit … - Unit 42Incident · 3 days ago – Blinder Tunnel Campaign Targets Iraqi Infrastructure
Analysis of Blinder Tunnel, an Iran-nexus campaign using fake Dubai Airports recruitment lures and GitHub C2 malware to target critical infrastructure. The post Blinder Tunnel Campaign Targets Iraqi Infrastructure appear… - Sophos X-OpsResearch · 4 days ago – Citrix NetScaler vulnerability (CVE-2026-88779) in active exploitation
Categories: Threat Research Tags: advisory, vulnerability, Citrix - Sophos X-OpsResearch · 9 days ago – TerminalFix and Lorem Ipsum Loader enable covert tunneling
The activity is linked to a broader campaign that previously used a different delivery mechanism Categories: Threat Research Tags: TerminalFix, clickfix, Lorem Ipsum Loader - The RecordNews · yesterday – International coalition seizes tools used by cyber firm behind Flax Typhoon
The U.S. and other nations took down digital tools and infrastructure by Beijing-based Integrity Tech that allowed "widespread vulnerability scanning and, in some cases, intrusions" as part of the Flax Typhoon campaign. - The RecordIncident · yesterday – DOJ charges ransomware recovery CEO for secretly paying hackers
The owner of a ransomware recovery firm was hit with wire fraud charges for allegedly making secret ransom payments while overcharging the victims of attacks. - Security Affairs (APT)Incident · yesterday – U.S. Offers $10 Million Reward for Alleged HAFNIUM Hacker Zhang Yu
The U.S. offers $10M for Zhang Yu, accused of helping run HAFNIUM attacks that compromised thousands of organizations worldwide. The U.S. State Department is offering a $10 million reward for information leading to the a… - Security Affairs (APT)Incident · 5 days ago – Warlock Ransomware Still Exploits Year-Old SharePoint Flaws to Hit Critical Infrastructure
Warlock ransomware continues to exploit unpatched SharePoint flaws to breach water utilities, telecoms, governments, and universities worldwide. Warlock ransomware made headlines back in mid-2025 for exploiting a chain o… - Security Affairs (Cybercrime)News · yesterday – MonsterCloud Owner Charged With Secretly Paying Ransomware Demands
MonsterCloud owner Zohar Pinhasi allegedly paid ransomware demands behind clients’ backs, then charged them millions for the supposed recovery. Zohar Pinhasi, the owner of Florida-based MonsterCloud, was charged this wee… - Security Affairs (Cybercrime)Incident · 2 days ago – FortiBleed hit 86,000 firewalls by exploiting something nobody can patch away
FBI and Secret Service warn FortiBleed, a credential-harvesting campaign against Fortinet firewalls, has compromised 86,644 devices and is locking out admins. The FBI and the U.S. Secret Service issued a joint advisory a…
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: 151 via Ransomware.live
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.
- Safepay — SafePay emerged in September 2024 as a rapidly growing ransomware operation that explicitly disavows the RaaS model and manages all operations internally, claiming over 300 victims worldwide by mid-2025 with a high-profile early attack against UK telematics firm Microlise stealing 1.2 TB of data.
- Krybit — Krybit is an emerging RaaS group that launched in late March 2026, offering affiliates an 80/20 revenue split with support for Windows, Linux, ESXi, and NAS device encryption, and became notable for a public feud with rival group 0APT in which each breached and leaked the other's operator data.
- Silentransomgroup — A former Conti team
aka Chatty Spider and UNC3753
Most Targeted Sectors
Top Countries
US (46), DE (8), IN (6), ES (6), BR (5)
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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