CVE-2025-32433KEV · OVERDUECWE-306

Erlang/OTP SSH Vulnerable to Pre-Authentication RCE

Critical · published April 16, 2025

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 10.0. It is confirmed in active exploitation. It sits in the 99.9th percentile for exploit probability.

481
days past CISA
deadline
CVSS v3.1
10.0
EPSS
99%
Percentile
99.9
In the wild
Confirmed
What it is

🚨 A sneaky flaw in the SSH server of Erlang/OTP allows attackers to execute code without a password — think of it as leaving the front door wide open and putting up a "Welcome" mat for intruders! 🔥 Imagine your secure home, but somehow a crafty delivery person has access to your back door without needing to knock. In this scenario, the SSH server is like that door, and an attacker can slip inside without anyone noticing, executing commands at will! This vulnerability is absolutely devastating! An attacker can gain full control over affected systems without valid credentials, potentially compromising sensitive data, altering configurations, or even taking down services entirely. This is a critical situation that demands immediate attention!

Put simply

Imagine your secure home, but somehow a crafty delivery person has access to your back door without needing to knock. In this scenario, the SSH server is like that door, and an attacker can slip inside without anyone noticing, executing commands at will! CVE-2025-32433 allows unauthenticated remote code execution due to a flaw in SSH protocol message handling, providing attackers unauthorized access and the ability to execute arbitrary commands on affected systems prior to specified patched versions.

What to do

This vulnerability is absolutely devastating! An attacker can gain full control over affected systems without valid credentials, potentially compromising sensitive data, altering configurations, or even taking down services entirely. This is a critical situation that demands immediate attention! Patch your systems to versions OTP-27.3.3, OTP-26.2.5.11, or OTP-25.3.2.20 immediately! As a temporary workaround, consider disabling the SSH server or implementing strict firewall rules to block access. Don't leave that door ajar! You've got this! With quick action, you can secure your systems and earn your security hero badge! 🛡️

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.98786 · 99.9th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2025-04-16T21:34Z
KEV added
2025-06-09 · due 2025-06-30
EPSS history
Timeline
  • 09 JUN 00:00Z
    Added to CISA KEV — remediate by Jun 30
    kev
  • 16 APR 21:34Z
    Erlang/OTP SSH Vulnerable to Pre-Authentication RCE
    cvelistv5