CVE-2025-32433 Erlang Erlang/OTP: login or permission bypass
In plain words: A door that should be locked is not: part of the system can be reached without a valid login or permission. The attacker gets in as a user or administrator without knowing a password.
Confirmed exploited by CISA on · US federal patch deadline Jun 30, 2025
What to do
- Install Erlang's security update for Erlang/OTP. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Keep a list of every internet-facing server you run so nothing is forgotten.
- Patch anything in this catalog first, ahead of normal patch cycles.
- Put admin and file-transfer apps behind a VPN or single sign-on instead of the open internet.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: Mass data theft and ransomware: a single flaw in a file-transfer or email server has exposed thousands of organisations at once.
The details
- Official name
- Erlang Erlang/OTP SSH Server Missing Authentication for Critical Function Vulnerability
- Product
- Erlang Erlang/OTP
- CISA description
- Erlang Erlang/OTP SSH server contains a missing authentication for critical function vulnerability. This could allow an attacker to execute arbitrary commands without valid credentials, potentially leading to unauthenticated remote code execution (RCE). By exploiting a flaw in how SSH protocol messages are handled, a malicious actor could gain unauthorized access to affected systems. This vulnerability could affect various products that implement Erlang/OTP SSH server, including—but not limited to—Cisco, NetApp, and SUSE.
- Type of flaw
- Login or permission bypass (CWE-306)
- Confirmed exploited
- Jun 9, 2025
- US federal patch deadline
- Jun 30, 2025
Ask Cleus about it
Ask about a vulnerability, an update, a weird message, or the news. Plain-word answers, free, no account.
Answering about CVE-2025-32433 ·
Questions about CVE-2025-32433
Is CVE-2025-32433 being exploited?
Yes. CISA added CVE-2025-32433 to its Known Exploited Vulnerabilities catalog on Jun 9, 2025, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2025-32433?
Install Erlang's security update for Erlang/OTP. If no update exists, follow the vendor's workaround or stop using the product until one ships. Keep a list of every internet-facing server you run so nothing is forgotten.
Am I affected by CVE-2025-32433?
Only if you use Erlang Erlang/OTP. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.