Cicada3301
A ransomware group that appeared in 2024 and recruits affiliates to carry out attacks. It mainly hits small and mid-sized businesses opportunistically, with victims reported in Japan as well.
- Alert level
- 2/ 5
- Reports & advisories (90 days)
- 0
- Known exploited CVEs
- 0
- Personal data leaked (disclosed)
- None confirmed
Exploited vulnerabilities and targeted products
If you run any of these products, first make sure they are updated to a fixed version.
How they attack
Entry
Logging in with stolen credentials
Like walking through the front door with an employee badge picked up somewhere.
Inside
Silencing the guards
Like unplugging the security cameras and alarms before getting to work.
Goal
Locking data for ransom
Like padlocking the filing cabinets and demanding money for the key.
Sources
Attributions are quoted as assessed by governments and security vendors. VulnPulse does not make attributions itself.
Leak counts only add up figures disclosed by the affected companies or authorities, never the attackers' own claims. We do not list victim names or link to leak sites.
The alert level is calculated automatically from reports and advisories in the last 90 days, known exploited vulnerabilities, and whether the group has targeted Japan.
Updated 2026-10-23 · daily