Threat Intelligence Report — September 21, 2026 | 7 New KEVs · 205 Victims

by

Report Date: 2026-09-21

New KEVs: 7  — unchanged vs last weekRansomware Victims: 205  ▲ +68 vs last week

7 vulnerabilities were added to the CISA Known Exploited Vulnerabilities catalog this period. Linux products show the strongest concentration of risk signals this week. Ransomware activity is moderate with 205 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-2026-76460 – Cisco Identity Services Engine | CVSS 10.0 | EPSS 0.8% / 54th pct
    CISA deadline: 2026-09-19 (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.
  2. CVE-2026-58704 – Google Pixel | CVSS 8.8 | EPSS 0.2% / 11th pct
    CISA deadline: 2026-09-19 (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.
  3. CVE-2026-87886 – Acronis Backup | CVSS 7.8 | EPSS 0.3% / 17th pct
    CISA deadline: 2026-09-19 (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.

New Today

  • CVE-2026-7273 – Zyxel GS1900 Series Switches | CVSS 8.8 (HIGH) | AV: Adjacent | EPSS 0.3% / 25th pct | Ransomware Use: No

Still Outstanding

  • CVE-2026-76460 – Cisco Identity Services Engine | CVSS 10.0 (CRITICAL) | AV: Network | EPSS 0.8% / 54th pct | Ransomware Use: No
  • CVE-2025-39682 – Linux Kernel | CVSS 9.8 (CRITICAL) | AV: Network | EPSS 1.2% / 66th pct | Ransomware Use: No
  • CVE-2026-53266 – Linux Kernel | CVSS 8.8 (HIGH) | AV: Local | EPSS 0.3% / 20th pct | Ransomware Use: No
  • CVE-2026-58704 – Google Pixel | CVSS 8.8 (HIGH) | AV: Adjacent | EPSS 0.2% / 11th pct | Ransomware Use: No
  • CVE-2025-39964 – Linux Kernel | CVSS 7.8 (HIGH) | AV: Local | EPSS 0.8% / 54th pct | Ransomware Use: No
  • CVE-2026-87886 – Acronis Backup | CVSS 7.8 (HIGH) | AV: Local | EPSS 0.3% / 17th pct | Ransomware Use: No

Security News

Advisories, threat research, and incident reports from 12 sources across government, commercial research, and security journalism — prioritized by source credibility.

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.

25 new victims posted today
7-day total: 205 via Ransomware.live

Most Active Groups

Thegentlemen 31 Qilin 27 Storm 11 Akira 11 N0N 11

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.
  • Akira — The Akira ransomware group is said to have emerged in March 2023, and there's much speculation about its ties to the former CONTI ransomware group.<br> <br> It's worth noting that with the end of CONTI's operation, several affiliates migrated to independent campaigns such as Royal, BlackBasta, and others.<br> <br> According to some reports, Akira affiliates also work with other ransomware operations, such as Snatch and BlackByte, as an open directory of tools used by an Akira operator was identified, which also had connections to the Snatch ransomware.<br> <br> The first version of the Akira ransomware was written in C++ and appended files with the '.akira' extension, creating a ransom note named 'akira_readme.txt,' partially based on the Conti V2 source code. However, on June 29, 2023, a decryptor for this version was reportedly released by Avast.<br> <br> Subsequently, a version was released that fixed the decryption flaw on July 2, 2023. Since then, the new version is said to be written in Rust, this time called 'megazord.exe,' and it changes the extension to '.powerranges' for encrypted files.<br> <br> Most of Akira's initial access vectors use brute-force attempts on Cisco VPN devices (which use single-factor authentication only).<br> Additionally, exploitation of CVEs: CVE-2019-6693 and CVE-2022-40684 for initial access has been identified.<BR>Source: https://github.com/crocodyli/ThreatActors-TTPs

Most Targeted Sectors

Manufacturing 35 Technology 31 Other 21 Professional Services 18 Healthcare 16

Top Countries

US (60), DE (10), IT (10), BR (8), CA (7)

Notable Incidents

  • Namibian Defence Force (Government & Defense · NA) — claimed by Ransomhouse. The Namibian Defence Force comprises the national military forces of Namibia. It was created when the country, then known as South West Africa, gained independence from apartheid South Africa in 1990. Press coverage →
  • Kreishandwerkerschaft Borken (Professional Services · DE) — claimed by Rhysida. Kreishandwerkerschaft Borken Press coverage →
  • Springfield Public Schools (Education · US) — claimed by Interlock. Springfield Public Schools in Springfield, Massachusetts, is the third-largest school district in the state, with over 23,500 students and over 4,200 full-time employees. The school budget accounts for more than two-thir… Press coverage →
  • Lazyboyz (Other · UNKNOWN) — claimed by Akira. Lazy Boyz – Harley-Davidson Oslo specializes in motorcycles and workshop services, particularly
    for Harley-Davidson and Royal Enfield, with over 30 years of experience. They offer a wide ran
    ge of new and used motorcycle…     Press coverage →
  • ryomo.co.jp (Not Found · JP) — claimed by Safepay. Established in January 1970 as a regional computer-services center, the company has developed into a publicly listed systems integrator providing … 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.

Linux 3 Cisco 2 Zyxel 1 Acronis 1 Google 1 KEVs CVEs Mentions

Stay Ahead

Found this useful? Get the daily report in your reader.

Free. No account. No email. Follow in Feedly, Inoreader, or any RSS reader.