Erlang Erlang/OTP SSH Server Missing Authentication for Critical Function Vulnerability
erlang — otp
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.
10.0
98.6%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Published
- Apr 16, 2025
- Modified
- Jun 17, 2026
- Added to KEV
- Jun 9, 2025
- Federal patch due
- Jun 30, 2025
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
8 foundWeaponization
Public repositories whose name or description references CVE-2025-32433, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
- ProDefense/CVE-2025-32433★ 142
CVE-2025-32433 https://github.com/erlang/otp/security/advisories/GHSA-37cp-fgq5-7wc2
updated Sep 14, 2026
- omer-efe-curkus/CVE-2025-32433-Erlang-OTP-SSH-RCE-PoC★ 16
The vulnerability allows an attacker with network access to an Erlang/OTP SSH server to execute arbitrary code without prior authentication.
updated Jun 16, 2026
- NiteeshPujari/CVE-2025-32433-PoC★ 7
CVE-2025-32433 PoC: Unauthenticated Remote Code Execution (RCE) in Erlang/OTP SSH. A proof-of-concept exploit for CVE-2025-32433
updated Jun 15, 2026
- TeneBrae93/CVE-2025-3243★ 7
A proof-of-concept exploit for CVE-2025-32433, a critical vulnerability in Erlang's SSH library that allows pre-authenticated code execution via malformed SSH_MSG_CHANNEL_REQUEST packets.
updated Nov 16, 2025
- m0usem0use/erl_mouse★ 6
python script to find vulnerable targets of CVE-2025-32433
updated Sep 17, 2026
- 0xPThree/cve-2025-32433★ 6
updated Apr 21, 2026
- ekomsSavior/POC_CVE-2025-32433★ 4
updated Sep 18, 2026
- darses/CVE-2025-32433★ 3
Security research on Erlang/OTP SSH CVE-2025-32433.
updated Jan 16, 2026
References
Frequently asked questions
What is CVE-2025-32433?
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.
How severe is CVE-2025-32433?
CVE-2025-32433 has a CVSS base score of 10.0 out of 10 (CVSS 3.1).
Is CVE-2025-32433 actively exploited in the wild?
Yes. CVE-2025-32433 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jun 9, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2025-32433?
98.6% - meaning FIRST.org's EPSS model estimates a 98.6% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2025-32433?
We found 8 public GitHub repositories referencing CVE-2025-32433, though none matched a known Nuclei template or Metasploit module at last check. Review each one before relying on it - see the proof-of-concept section above.
What type of vulnerability is CVE-2025-32433?
CVE-2025-32433 is classified under CWE-306 (CWE-306: Missing Authentication for Critical Function).
Cross-checked against
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