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Ransomware Intelligence

CISA flags a vulnerability as "used by ransomware" only when a campaign is confirmed. These are flaws extortion groups have already exploited: fixing them first removes the most concrete risk.

361
CVEs used by ransomware · 21% of the KEV catalog
3
added in the last 90 days
173
critical
121
victims posted (30 days)
408
groups tracked

Vendors most exploited by ransomware

Most common weaknesses (CWE)

By year added to KEV

Most active groups (30 days)

Victims posted on leak sites, according to ransomware.live. Victim names are not displayed.

GroupVictimsLast activity
N0n 41 13h
Wallstreet 13 1d
qilin 9 1d
interlock 6 3d
play 5 2d
akira 3 1d
AuditTeam 3 2d
Dark Project 3 3d
lockbit5 3 1d
Emperador 3 8h
everest 3 2d
iah6477 3 6h
All groups →

Most affected countries (30 days)

  • United States25
  • Sweden10
  • Brazil8
  • South Korea8
  • United Kingdom5
  • Singapore4
  • India4
  • Spain3
  • Germany3
  • Japan3

Most affected sectors (30 days)

  • Transportation28
  • Professional Services19
  • Healthcare13
  • Manufacturing11
  • Other10
  • Retail & E-Commerce8
  • Technology7
  • Financial Services3
  • Energy & Utilities3
  • Hospitality2

Groups and the CVEs they exploit

clop 5akira 3alphv 3conti 3hive 3play 3medusa 2vicesociety 2atomsilo 1blackbyte 1blackshadow 1BrainCipher 1esxiargs 1frag 1handala 1icefire 1incransom 1karma 1lockbit 1maze 1nightsky 1nightspire 1nokoyawa 1revil 1reynolds 1underground 1

CVEs used in ransomware campaigns

Severity
Clear

10 result(s)

CVE-2026-15409 Critical · 10.0 KEV Urgent · 92 Public exploit Ransomware CWE-918 Jul 14, 2026
SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability
A Server-side request forgery (SSRF) vulnerability has been identified in the SMA1000 Appliance Work Place interface. A remote unauthenticated attacker could potentially cause the appliance to make requests to unintended location.
CVE-2024-21893 High · 8.2 KEV Urgent · 89 Public exploit Ransomware CWE-918 Jan 31, 2024
Ivanti Connect Secure, Policy Secure, and Neurons Server-Side Request Forgery (SSRF) Vulnerability
A server-side request forgery vulnerability in the SAML component of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure (9.x, 22.x) and Ivanti Neurons for ZTA allows an attacker to access certain restricted resources without authentication.
CVE-2022-41040 High · 8.8 KEV Urgent · 94 Public exploit Ransomware CWE-918 Oct 2, 2022
Microsoft Exchange Server Server-Side Request Forgery Vulnerability
Microsoft Exchange Server Elevation of Privilege Vulnerability
CVE-2021-21975 High · 7.5 KEV Urgent · 85 Public exploit Ransomware CWE-918 Mar 31, 2021
VMware Server Side Request Forgery in vRealize Operations Manager API
Server Side Request Forgery in vRealize Operations Manager API (CVE-2021-21975) prior to 8.4 may allow a malicious actor with network access to the vRealize Operations Manager API can perform a Server Side Request Forgery attack to steal administrative credentials.
CVE-2021-40438 Critical · 9.0 KEV Urgent · 83 Public exploit Ransomware CWE-918 Sep 16, 2021
Apache HTTP Server-Side Request Forgery (SSRF)
A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier.
CVE-2021-21985 Critical · 9.8 KEV Urgent · 89 Public exploit Ransomware CWE-918 May 26, 2021
VMware vCenter Server Improper Input Validation Vulnerability
The vSphere Client (HTML5) contains a remote code execution vulnerability due to lack of input validation in the Virtual SAN Health Check plug-in which is enabled by default in vCenter Server. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server.
CVE-2021-26855 Critical · 9.1 KEV Urgent · 100 Public exploit Ransomware CWE-918 Mar 2, 2021
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-34473 Critical · 9.1 KEV Urgent · 99 Public exploit Ransomware CWE-918 Jul 14, 2021
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-22986 Critical · 9.8 KEV Urgent · 93 Public exploit Ransomware CWE-918 Mar 31, 2021
F5 BIG-IP and BIG-IQ Centralized Management iControl REST Remote Code Execution Vulnerability
On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3 amd BIG-IQ 7.1.0.x before 7.1.0.3 and 7.0.0.x before 7.0.0.2, the iControl REST interface has an unauthenticated remote command execution vulnerability. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
CVE-2021-27103 Critical · 9.8 KEV High · 69 Ransomware CWE-918 Feb 16, 2021
Accellion FTA Server-Side Request Forgery (SSRF) Vulnerability
Accellion FTA 9_12_411 and earlier is affected by SSRF via a crafted POST request to wmProgressstat.html. The fixed version is FTA_9_12_416 and later.

Sources: CISA KEV (knownRansomwareCampaignUse field) and ransomware.live (groups, TTPs and victim counts). The absence of a KEV flag does not mean a flaw is not used by ransomware.