How to mitigate CVE-2025-32433

Fidelis Security

Dec 17, 2025

A critical Erlang SSH vulnerability (CVE-2025-32433), also known as Chainbreaker, allows attackers to exploit pre-auth SSH behavior for remote code execution. In this video, we break down exactly what security teams need to do — from immediate mitigation to long-term prevention.

🔍 What you’ll learn in this video:

How to mitigate CVE-2025-32433 by upgrading Erlang OTP (27.3.3 / 26.2.5.11 / 25.3.2.20)

Temporary safeguards if patching isn’t possible

Detection tips for SIEM/IDS: spotting pre-auth channel_request activity

How to hunt for compromise (beam/erl spawning shells, new users, new files)

Blocking known malicious outbound domains

Incident response steps: isolate, rebuild, rotate credentials

Long-term prevention strategies and compliance logging (CISA-ready)

🛡️ Key takeaway:
Patch fast. Detect early. Respond decisively.

Click here to read more -

#CVE202532433 #ErlangSSH #Chainbreaker #Cybersecurity #ThreatDetection #IncidentResponse #SOC #VulnerabilityManagement #FidelisSecurity