Hazard

Is CVE-2023-29300 being exploited?

Ransomware crews are using this

CISA has linked this vulnerability to known ransomware campaigns. Treat any exposed instance as an active incident, not a patching ticket.

Adobe ColdFusion Deserialization of Untrusted Data Vulnerability

Adobe · ColdFusion

CVSS 9.8 EPSS 100% no public exploit indexed ransomware Fix deadline passed 29 January 2024

What it is

Adobe ColdFusion contains a deserialization of untrusted data vulnerability that allows for code execution.

Why we say that

  • Linked by CISA to known ransomware campaigns
  • EPSS puts exploitation in the next 30 days at 100%
  • CISA's federal remediation deadline (2024-01-29) has passed
  • CVSS 9.8 critical
  • Listed in the CISA Known Exploited Vulnerabilities catalogue

Every line above comes from a named public source. Where the evidence is thin, we say so rather than inventing confidence — see methodology.

What to do

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

What it costs when this goes wrong

This is where UK enforcement meets the vulnerability record. This vulnerability is used in ransomware campaigns; here is what ransomware has cost UK organisations at the regulator.

All UK cases caused by ransomware →