Intelligence online17 sources monitored8 actively exploited 7d26 published 24hChecked recently
Vulnerability record

CVE-2025-32433

Erlang Erlang/OTP SSH Server Missing Authentication for Critical Function Vulnerability

CriticalExploitation confirmedCISA KEV
What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Erlang/OTP, fix it now.

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.

US federal civilian agencies must remediate by Jun 30, 2025.

Patch status

Official fix available since

Apply the vendor's update to every affected system. Check the fixed-in versions below where known.

Basis: NVD patch reference

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.

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

ProductVendorAffected versionsFixed inSource
Erlang/OTPErlang< 25.3.2.20; >= 26.0, < 26.2.5.11; >= 27.0, < 27.3.325.3.2.20; 26.2.5.11; 27.3.3KEV

Sources: KEV = CISA Known Exploited Vulnerabilities catalog.

Intelligence timeline

Developments from the last 30 days, newest first.

  1. CVSS scoredUpdateKEV

    CVE-2025-32433 scored CVSS 10.0: Erlang Erlang/OTP, Erlang Erlang/OTP SSH Server Missing Authentication for Critical Function Vulnerability

    CISA lists this as exploited in the wild. Unpatched Erlang/OTP systems are exposed to active attacks now.

    Basis: NIST National Vulnerability Database

  2. Patch releasedUpdateKEV

    Patch released for CVE-2025-32433: Erlang Erlang/OTP, Erlang Erlang/OTP SSH Server Missing Authentication for Critical Function Vulnerability

    An official fix is now available for Erlang Erlang/OTP. This vulnerability is being exploited, so apply it promptly.

    Basis: NVD patch reference

1 earlier event is available with a subscription. See plans.

Coverage

We have not published a story about this vulnerability yet.

References

  • github.com https://github.com/erlang/otp/security/advisories/GHSA-37cp-fgq5-7wc2
  • sec.cloudapps.cisco.com https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-erlang-otp-ssh-xyZZy
  • nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2025-32433
  • 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
  • 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
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-32433