Threat Intelligence Report — October 10, 2026 | 6 New KEVs · 197 Victims

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Report Date: 2026-10-10

New KEVs: 6  ▼ -1 vs last weekRansomware Victims: 197  ▼ -32 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 Qilin. Ransomware activity is moderate with 197 new victims posted to leak sites over the last 7 days, with Thegentlemen posting the most victims.

On this page

  1. Patch This Week
  2. Top KEVs
  3. Security News
  4. Ransomware Activity
  5. Vendor-Specific Risks

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-2026-88779 – Citrix NetScaler | CVSS 8.7 | EPSS 0.6% / 47th pct
    CISA deadline: 2026-10-07 (overdue by 3d) — 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-2015-3306 – ProFTPD ProFTPD | CVSS 10.0 | EPSS 98.0% / 100th pct | PoC Available
    CISA deadline: 2026-10-11 (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.
  3. CVE-2021-3199 – ONLYOFFICE Docs | CVSS 9.8 | EPSS 14.5% / 97th pct | PoC Available
    CISA deadline: 2026-10-11 (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.

This Reporting Window

  • CVE-2015-3306 – ProFTPD ProFTPD | CVSS 10.0 (CRITICAL) | AV: Network | EPSS 98.0% / 100th pct | Ransomware Use: No | PoC Available
  • CVE-2021-3199 – ONLYOFFICE Docs | CVSS 9.8 (CRITICAL) | AV: Network | EPSS 14.5% / 97th 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 94.5% / 100th pct | Ransomware Use: No | PoC Available
  • CVE-2015-5477 – ISC BIND | CVSS 7.5 (HIGH) | AV: Network | EPSS 91.8% / 100th pct | Ransomware Use: No | PoC Available
  • CVE-2023-22894 – Strapi Strapi | CVSS 4.9 (MEDIUM) | AV: Network | EPSS 3.4% / 89th 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

Qilin

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.

62 new victims posted today
7-day total: 197 via Ransomware.live

Most Active Groups

Thegentlemen 42 Qilin 22 Safepay 10 Umbra 9 Silentransomgroup 8

Group Intelligence

  • 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.
  • 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.
  • Silentransomgroup — A former Conti team
    aka Chatty Spider and UNC3753

Most Targeted Sectors

Manufacturing 34 Professional Services 25 Other 24 Technology 20 Healthcare 20

Top Countries

US (66), CA (10), BR (8), DE (8), ES (6)

Notable Incidents

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.

Citrix 2 Onlyoffice 1 Proftpd 1 Apache 1 Strapi 1 KEVs CVEs Mentions

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