CVE-2025-32433Erlang/OTP SSH Vulnerable to Pre-Authentication RCE
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.
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 10.0 | CRITICAL | 3.1GitHub_M (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
CISA required action
⚡ Known exploited · remediation due Jun 30, 2025
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Details
- CVE ID
- CVE-2025-32433
- Status
- Analyzed
- Assigner (CNA)
- GitHub_M
- Published
- Apr 16, 2025
- Last modified
- 2026-06-17 09:11 UTC
- Weaknesses
- CWE-306 · Missing Authentication for Critical Function
Affected Products
As published by the CNA in the CVE record.
erlangotp3 version ranges
- >= OTP-27.0-rc1, < OTP-27.3.3
- >= OTP-26.0-rc1, < OTP-26.2.5.11
- < OTP-25.3.2.20
References
- github.com https://github.com/erlang/otp/commit/0fcd9c56524b28615e8ece65fc0c3f66ef6e4c12
- github.com https://github.com/erlang/otp/commit/6eef04130afc8b0ccb63c9a0d8650209cf54892f
- github.com https://github.com/erlang/otp/commit/b1924d37fd83c070055beb115d5d6a6a9490b891
- github.com https://github.com/erlang/otp/security/advisories/GHSA-37cp-fgq5-7wc2
- openwall.com http://www.openwall.com/lists/oss-security/2025/04/16/2
- openwall.com http://www.openwall.com/lists/oss-security/2025/04/18/1
- openwall.com http://www.openwall.com/lists/oss-security/2025/04/18/2
- openwall.com http://www.openwall.com/lists/oss-security/2025/04/18/6
- openwall.com http://www.openwall.com/lists/oss-security/2025/04/19/1
- lists.debian.org https://lists.debian.org/debian-lts-announce/2025/04/msg00028.html
- security.netapp.com https://security.netapp.com/advisory/ntap-20250425-0001/
- github.com https://github.com/ProDefense/CVE-2025-32433/blob/main/CVE-2025-32433.py
- sec.cloudapps.cisco.com https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-erlang-otp-ssh-xyZZy
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-32433