Storm-0940
An espionage group that breaks into cloud email and similar services by guessing passwords at scale and abusing connected-app permissions. In autumn 2026 it used AI to automate attacks and leveraged a ConnectWise app to target hundreds of organizations.
- Alert level
- 1/ 5
- Reports & advisories (90 days)
- 2
- Known exploited CVEs
- 0
- Personal data leaked (disclosed)
- None confirmed
Attribution
- Assessed as a China-state aligned actor — Microsoft Threat Intelligence
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
Trying common passwords at scale
Like going door to door in a huge apartment block, quietly trying the most common PIN codes on each lock.
Entry
Hijacking a trusted connected app
Like stealing the pass of a cleaning contractor trusted by many buildings, then walking into each one.
Inside
Automating the work with AI
Like sending tireless robot helpers to do everything from scouting to carrying things out, all at once.
Goal
Staying in the cloud to gather information
Like a spy who copies the key and keeps coming back to read the mail.
Recent articles
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