HackZoneLabs News
Newsletter

CVE-2025-32433

Erlang/OTP SSH Vulnerable to Pre-Authentication RCE

  • Critical 10.0
  • Exploited: added to CISA KEV 9 Jun 2025

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.

Key facts

Published
16 Apr 2025
Last changed
26 Feb 2026
Assigned by
GitHub_M
KEV added
9 Jun 2025
KEV fix due
30 Jun 2025
EPSS
98.924% likely to be exploited in the next 30 days, higher than 99.929% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: yes; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 10.0CVSS 3.1, Criticalfrom the CNA (GitHub_M)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

What to do

  • Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
erlangotp
  • >= OTP-27.0-rc1, < OTP-27.3.3 (affected)
  • >= OTP-26.0-rc1, < OTP-26.2.5.11 (affected)
  • < OTP-25.3.2.20 (affected)

Timeline

  1. 16 Apr 2025 Published
  2. 9 Jun 2025 CVE-2025-32433 added to CISA KEV
  3. 9 Jun 2025 Added to the CISA KEV catalogue

Weakness

References