Historical catalog analysis: CISA added this entry on June 09, 2025. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.
What the vulnerability is
CVE-2025-32433 is a missing authentication for critical function vulnerability (CWE-306) located within the Erlang/OTP SSH server. The flaw exists in the handling of SSH protocol messages, which could allow an unauthenticated attacker to execute arbitrary commands on the affected system. This results in potential remote code execution (RCE) without the need for valid credentials.
Exposure and applicability
This vulnerability is not limited to a single product but affects any system implementing the Erlang/OTP SSH server. The source explicitly identifies that this includes, but is not limited to, products from Cisco, NetApp, and SUSE.
Infrastructure owners should identify assets where Erlang/OTP is utilized as the underlying SSH implementation. Because this is a common open-source project used across diverse hardware and software platforms, exposure may exist in network appliances, storage controllers, or enterprise Linux distributions that integrate this specific server component.
Remediation priorities
Our analysis suggests prioritizing remediation based on the accessibility of the SSH interface to untrusted networks. The following actions are recommended:
- Vendor-Specific Patching: Identify all assets from affected vendors (e.g., Cisco, NetApp, SUSE) and apply the specific mitigations provided by those vendors. This is the primary method for addressing the root cause.
- Asset Inventory Audit: Conduct a search for any other third-party software or custom implementations utilizing Erlang/OTP SSH to ensure no undocumented exposures exist.
- Service Decommissioning: In cases where a vendor has not provided a mitigation and the service is not mission-critical, discontinue use of the affected product to eliminate the attack vector.
How to validate remediation
Verification must go beyond simple version checks, as different vendors may backport fixes or implement compensating controls. To verify that exposure has been reduced:
- Vendor Validation: Follow the specific verification steps outlined in the vendor’s security advisory to confirm the patch is active.
- Configuration Audit: Confirm that the SSH server is only accessible from authorized management networks, reducing the likelihood of unauthenticated external access while patches are being deployed.
Limits and open questions
A deployed fix does not guarantee total immunity; residual risk remains if other vulnerabilities exist in the SSH stack or if configuration errors leave the service exposed. It remains unknown whether this vulnerability has been utilized in ransomware campaigns. Furthermore, because Erlang/OTP is a widely used library, the full list of affected third-party products may be larger than those explicitly named in the source.
Source and editorial note
CVE-2025-32433: Erlang Erlang/OTP SSH Server Missing Authentication for Critical Function Vulnerability · Source date: June 09, 2025 · Retrieved August 31, 2026.
Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.
Archive date: June 12, 2025. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: October 12, 2026 at 00:20 UTC.
Request a Vulnerability Assessment
Turn security intelligence into action.
Discuss your exposure, priorities, and the evidence needed to validate the outcome.
Request a security assessment ↗