CVE-2025-32433

CRITICAL10.0

CISA KEV

Published 2025-04-16 · Updated 2026-06-17 · Source security-advisories@github.com

Summary

CVE-2025-32433 is a critical-severity (CVSS 10.0) vulnerability in Erlang Erlang/OTP. CISA added it to the Known Exploited Vulnerabilities catalog on June 9, 2025, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by June 30, 2025. CISA does not currently list it as used in ransomware campaigns.

All 1 known-exploited Erlang vulnerabilities →

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

CWE-306

CISA Known-Exploited Vulnerability

Product: Erlang — Erlang/OTP

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

Date added: 2025-06-09 · Due: 2025-06-30

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.

References

View on NVD

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