CVE-2025-32433
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
- In the wild
- CISA lists this as exploited in real attacks. Treat as urgent.
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- ReservedThe CVE id was reserved by its CNA
- PublishedDisclosed publicly on CVE.org and NVD
- 2025-06-09 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
- 2025-06-30 Remediation deadlineCISA's due date for federal agencies to fix it
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
- Exploit odds: 98.9% in the next 30 days (EPSS).
- Severity: 10.0 CRITICAL (CVSS).
- Fix: a patch or advisory is linked.
- It meets the bar for Drop everything: critical, and exploited or very likely to be.
Details
- Published
- Last modified
- Added to CISA KEV
- 2025-06-09
- Exploit probability
- 98.9% · EPSS, next 30 days
- Weakness
- CWE-306 · Missing authentication
- Record status
- Analyzed
Affected
- Erlang erlang\/otp < 25.3.2.20
- Erlang erlang\/otp < 26.2.5.11
- Erlang erlang\/otp < 27.3.3
- Cisco Confd Basic < 7.7.19.1
- Cisco Confd Basic < 8.1.16.2
- Cisco Confd Basic < 8.2.11.1
- Cisco Confd Basic < 8.3.8.1
- Cisco Confd Basic < 8.4.4.1
Attack profile CVSS 3.1 · 10.0
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2025-32433.md and follow it. Check whether this project is affected by CVE-2025-32433. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/erlang/otp/commit/0fcd9c56524b28615e8ece65fc0c3f66ef6e4c12
- https://github.com/erlang/otp/commit/6eef04130afc8b0ccb63c9a0d8650209cf54892f
- https://github.com/erlang/otp/commit/b1924d37fd83c070055beb115d5d6a6a9490b891
- https://github.com/erlang/otp/security/advisories/GHSA-37cp-fgq5-7wc2
References
- https://github.com/erlang/otp/commit/0fcd9c56524b28615e8ece65fc0c3f66ef6e4c12
- https://github.com/erlang/otp/commit/6eef04130afc8b0ccb63c9a0d8650209cf54892f
- https://github.com/erlang/otp/commit/b1924d37fd83c070055beb115d5d6a6a9490b891
- https://github.com/erlang/otp/security/advisories/GHSA-37cp-fgq5-7wc2
- http://www.openwall.com/lists/oss-security/2025/04/16/2
- http://www.openwall.com/lists/oss-security/2025/04/18/1
- http://www.openwall.com/lists/oss-security/2025/04/18/2
- http://www.openwall.com/lists/oss-security/2025/04/18/6
- http://www.openwall.com/lists/oss-security/2025/04/19/1
- https://lists.debian.org/debian-lts-announce/2025/04/msg00028.html
- https://security.netapp.com/advisory/ntap-20250425-0001/
- https://github.com/ProDefense/CVE-2025-32433/blob/main/CVE-2025-32433.py
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-erlang-otp-ssh-xyZZy
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-32433