CVE-2025-32433

CriticalCVSS 10.0/10Known exploited (CISA KEV)Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 10.0/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-306

Affected software

Vendor	Product	Versions
erlang	otp	>= OTP-27.0-rc1, < OTP-27.3.3; >= OTP-26.0-rc1, < OTP-26.2.5.11; < OTP-25.3.2.20

References

https://github.com/erlang/otp/commit/0fcd9c56524b28615e8ece65fc0c3f66ef6e4c12Patch
https://github.com/erlang/otp/commit/6eef04130afc8b0ccb63c9a0d8650209cf54892fPatch
https://github.com/erlang/otp/commit/b1924d37fd83c070055beb115d5d6a6a9490b891Patch
https://github.com/erlang/otp/security/advisories/GHSA-37cp-fgq5-7wc2Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/04/16/2Mailing List
http://www.openwall.com/lists/oss-security/2025/04/18/1Mailing List
http://www.openwall.com/lists/oss-security/2025/04/18/2Mailing List
http://www.openwall.com/lists/oss-security/2025/04/18/6Mailing List
http://www.openwall.com/lists/oss-security/2025/04/19/1Mailing List
https://lists.debian.org/debian-lts-announce/2025/04/msg00028.htmlThird Party Advisory
https://security.netapp.com/advisory/ntap-20250425-0001/Third Party Advisory
https://github.com/ProDefense/CVE-2025-32433/blob/main/CVE-2025-32433.pyExploit
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-erlang-otp-ssh-xyZZyThird Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-32433US Government Resource

Timeline

Published: Apr 16, 2025
Last modified: Jun 17, 2026
Added to CISA KEV: Jun 9, 2025
NVD status: Analyzed

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