What’s Vulnerable › Vulnerabilities

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

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.

Affected products

How to fix

Upgrade to a fixed version: Cisco Cloud Native Broadband Network Gateway 2025.03.1; Cisco Confd Basic 7.7.19.1, 8.1.16.2, 8.2.11.1, 8.3.8.1; Cisco Enterprise NFV Infrastructure Software 4.18; Cisco Ncs 2000 Shelf Virtualization Orchestrator Firmware 25.1.1; Cisco Network Services Orchestrator 5.7.19.1, 6.1.16.2, 6.2.11.1, 6.3.8.1; Cisco Optical Site Manager 25.2.1; Cisco Smart Phy 25.2; Cisco StarOS 2025.03; Cisco Ultra Cloud Core 2025.03.1; Cisco Ultra Packet Core 2025.03; Erlang OTP 25.3.2.20, 26.2.5.11, 27.3.3. Check the vendor advisory for mitigations.

References

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