Vulnerability details
CVE-2025-32433
Actively exploitedErlang/OTP SSH Vulnerable to Pre-Authentication RCE
Remedy
Required action (CISA): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. (due: 2025-06-30)
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 10.0Critical | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| erlang | OTP | < OTP-25.3.2.20 | CVEProject cvelistV5 (CNA) |
| erlang | OTP | >= OTP-26.0-rc1, < OTP-26.2.5.11 | CVEProject cvelistV5 (CNA) |
| erlang | OTP | >= OTP-27.0-rc1, < OTP-27.3.3 | CVEProject cvelistV5 (CNA) |
References and advisories
14- https://github.com/erlang/otp/security/advisories/GHSA-37cp-fgq5-7wc2 x_refsource_CONFIRM
- https://github.com/erlang/otp/commit/0fcd9c56524b28615e8ece65fc0c3f66ef6e4c12 x_refsource_MISC
- https://github.com/erlang/otp/commit/6eef04130afc8b0ccb63c9a0d8650209cf54892f x_refsource_MISC
- https://github.com/erlang/otp/commit/b1924d37fd83c070055beb115d5d6a6a9490b891 x_refsource_MISC
- http://www.openwall.com/lists/oss-security/2025/04/16/2
- http://www.openwall.com/lists/oss-security/2025/04/18/1
- http://www.openwall.com/lists/oss-security/2025/04/18/2
- http://www.openwall.com/lists/oss-security/2025/04/18/6
- http://www.openwall.com/lists/oss-security/2025/04/19/1
- https://security.netapp.com/advisory/ntap-20250425-0001/
- https://lists.debian.org/debian-lts-announce/2025/04/msg00028.html
- https://github.com/ProDefense/CVE-2025-32433/blob/main/CVE-2025-32433.py exploit
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-erlang-otp-ssh-xyZZy vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-32433 government-resource
Details
- Published
- 2025-04-17
- Last updated
- 2026-02-26
- State
- Published
- Assigner (CNA)
- GitHub_M
- Kolun priority
- 90 · Critical
CISA KEV catalog
- Date added
- 2025-06-09
- Due date
- 2025-06-30
- Used in ransomware
- Unknown
Exploit prediction (EPSS)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Active
- Technical impact
- Total
Weaknesses (CWE)
- CWE-306Missing Authentication for Critical Function