CVE-2025-32433

Known Exploited Public Exploit
Erlang/OTP SSH Vulnerable to Pre-Authentication RCE

Description

Erlang/OTP is a set of libraries for the Erlang programming language. Prior to versions OTP-27.3.3, OTP-26.2.5.11, and OTP-25.3.2.20, a SSH server may allow an attacker to perform unauthenticated remote code execution (RCE). By exploiting a flaw in SSH protocol message handling, a malicious actor could gain unauthorized access to affected systems and execute arbitrary commands without valid credentials. This issue is patched in versions OTP-27.3.3, OTP-26.2.5.11, and OTP-25.3.2.20. A temporary workaround involves disabling the SSH server or to prevent access via firewall rules.

Category

10.0
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 50.21% Top 5%
KEV Since 
Vendor Advisory github.com
Affected: erlang otp
Published at:
Updated at:

References

Link Tags
https://github.com/erlang/otp/security/advisories/GHSA-37cp-fgq5-7wc2 vendor advisory
https://github.com/erlang/otp/commit/0fcd9c56524b28615e8ece65fc0c3f66ef6e4c12 patch
https://github.com/erlang/otp/commit/6eef04130afc8b0ccb63c9a0d8650209cf54892f patch
https://github.com/erlang/otp/commit/b1924d37fd83c070055beb115d5d6a6a9490b891 patch
http://www.openwall.com/lists/oss-security/2025/04/16/2 mailing list
http://www.openwall.com/lists/oss-security/2025/04/18/1 mailing list
http://www.openwall.com/lists/oss-security/2025/04/18/2 mailing list
http://www.openwall.com/lists/oss-security/2025/04/18/6 mailing list
http://www.openwall.com/lists/oss-security/2025/04/19/1 mailing list
https://security.netapp.com/advisory/ntap-20250425-0001/ third party advisory
https://github.com/ProDefense/CVE-2025-32433/blob/main/CVE-2025-32433.py exploit

Frequently Asked Questions

What is the severity of CVE-2025-32433?
CVE-2025-32433 has been scored as a critical severity vulnerability.
How to fix CVE-2025-32433?
To fix CVE-2025-32433, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-32433 being actively exploited in the wild?
It is confirmed that CVE-2025-32433 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~50% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-32433?
CVE-2025-32433 affects erlang otp.
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