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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| erlang | otp | >= OTP-27.0-rc1, < OTP-27.3.3, >= OTP-26.0-rc1, < OTP-26.2.5.11, < OTP-25.3.2.20 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | erlang | 1:27.3.3+dfsg-1 | — |
| Debian 13 | erlang | 1:27.3.3+dfsg-1 | — |
| Debian 12 | erlang | 1:25.2.3+dfsg-1+deb12u1 | DSA-5906-1 |
| Debian 11 | erlang | 1:23.2.6+dfsg-1+deb11u2 | DLA-4132-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.04 | erlang | 1:27.3+dfsg-1ubuntu1.1 | USN-7443-2 |
| Ubuntu 24.04 LTS | erlang | 1:25.3.2.8+dfsg-1ubuntu4.3 | USN-7443-1 |
| Ubuntu 22.04 LTS | erlang | 1:24.2.1+dfsg-1ubuntu0.4 | USN-7443-1 |
| Ubuntu 20.04 LTS | erlang | 1:22.2.7+dfsg-1ubuntu0.5 | USN-7443-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | erlang | 1:20.2.2+dfsg-1ubuntu2+esm1 | USN-7443-3 |
| Ubuntu Pro 16.04 LTS | erlang | 1:18.3-dfsg-1ubuntu3.1+esm1 | USN-7443-3 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | erlang | 23.3.4.19-150300.3.20.1 | SUSE-SU-2025:1357-1 |
| SLES 15 SP6 | erlang26 | 26.2.1-150300.7.11.1 | SUSE-SU-2025:1356-1 |
| SLES 15 SP5 | erlang | 23.3.4.19-150300.3.20.1 | SUSE-SU-2025:1357-1 |
| SLES 15 SP4 | erlang | 23.3.4.19-150300.3.20.1 | SUSE-SU-2025:1357-1 |
| SLES 15 SP3 | erlang | 23.3.4.19-150300.3.20.1 | SUSE-SU-2025:1357-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP5 | erlang | 23.3.4.19-150300.3.20.1 | SUSE-SU-2025:1357-1 |
| SLES for SAP 15 SP4 | erlang | 23.3.4.19-150300.3.20.1 | SUSE-SU-2025:1357-1 |
| SLES for SAP 15 SP3 | erlang | 23.3.4.19-150300.3.20.1 | SUSE-SU-2025:1357-1 |
| SLE HPC 15 SP5 | erlang | 23.3.4.19-150300.3.20.1 | SUSE-SU-2025:1357-1 |
| SLE HPC 15 SP4 | erlang | 23.3.4.19-150300.3.20.1 | SUSE-SU-2025:1357-1 |
| SLE HPC 15 SP3 | erlang | 23.3.4.19-150300.3.20.1 | SUSE-SU-2025:1357-1 |
| SUSE Manager Server 4.3 | erlang | 23.3.4.19-150300.3.20.1 | SUSE-SU-2025:1357-1 |
| SUSE Manager Proxy 4.3 | erlang | 23.3.4.19-150300.3.20.1 | SUSE-SU-2025:1357-1 |
| SUSE Enterprise Storage 7.1 | erlang | 23.3.4.19-150300.3.20.1 | SUSE-SU-2025:1357-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | erlang | 23.3.4.19-150300.3.20.1 | SUSE-SU-2025:1357-1 |
| openSUSE Leap 15.6 | erlang26 | 26.2.1-150300.7.11.1 | SUSE-SU-2025:1356-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.21 | erlang | 26.2.5.11-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | erlang | 26.2.5.11-1 | — |
| Azure Linux 2 (CBL-Mariner) | erlang | 25.3.2.20-1 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Metasploit 1 module
-
Erlang OTP Pre-Auth RCE Scanner and Exploit
exploit/linux/ssh/ssh_erlangotp_rce
GitHub 43 repositories · most starred shown
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ProDefense/CVE-2025-32433 ★ 142 · Apr 18, 2025
CVE-2025-32433 https://github.com/erlang/otp/security/advisories/GHSA-37cp-fgq5-7wc2
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omer-efe-curkus/CVE-2025-32433-Erlang-OTP-SSH-RCE-PoC ★ 16 · Apr 18, 2025
The vulnerability allows an attacker with network access to an Erlang/OTP SSH server to execute arbitrary code without prior authentication.
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NiteeshPujari/CVE-2025-32433-PoC ★ 7 · Aug 13, 2025
CVE-2025-32433 PoC: Unauthenticated Remote Code Execution (RCE) in Erlang/OTP SSH. A proof-of-concept exploit for CVE-2025-32433
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0xPThree/cve-2025-32433 ★ 6 · Apr 19, 2025
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m0usem0use/erl_mouse ★ 6 · Apr 18, 2025
python script to find vulnerable targets of CVE-2025-32433
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ekomsSavior/POC_CVE-2025-32433 ★ 4 · Apr 18, 2025
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0x7556/CVE-2025-32433 ★ 3 · Apr 25, 2025
CVE-2025-32433 Erlang/OTP SSH RCE Exploit SSH远程代码执行漏洞EXP
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darses/CVE-2025-32433 ★ 3 · Apr 18, 2025
Security research on Erlang/OTP SSH CVE-2025-32433.
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LemieOne/CVE-2025-32433 ★ 3 · Apr 18, 2025
Missing Authentication for Critical Function (CWE-306)-Exploit
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exa-offsec/ssh_erlangotp_rce ★ 3 · Apr 18, 2025
Exploitation module for CVE-2025-32433 (Erlang/OTP)
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 13
- USN-7443-3 erlang vulnerability Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-7443-1 erlang vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-5906-1 erlang - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4132-1 erlang - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ICSA-26-043-06 Siemens SINEC OS CISA ICS & IT advisories · Feb 25, 2026
- SSA-089022 SSA-089022: Multiple Vulnerabilities in Third-Party Components in SINEC OS before V3.3 Siemens ProductCERT · Feb 24, 2026
- SUSE-SU-2025:1356-1 Security update for erlang26 SUSE / openSUSE Security Updates · Feb 4, 2026
- USN-7443-2 erlang vulnerability Ubuntu Security Notices (USN) · Feb 4, 2026
- SUSE-SU-2025:1357-1 Security update for erlang SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-0838 Erlang/OTP SSH: Schwachstelle ermöglicht Codeausführung BSI CERT-Bund (WID) · Nov 4, 2025
- ICSA-25-140-07 Schneider Electric Galaxy VS, Galaxy VL, Galaxy VXL (Update A) CISA ICS & IT advisories · Sep 24, 2025
- SEVD-2025-133-05 Galaxy VS, Galaxy VL, Galaxy VXL Schneider Electric CPCERT · Sep 24, 2025
- NCSC-2025-0137 Kwetsbaarheid verholpen in Erlang/OTP SSH-server NCSC-NL (Netherlands) · Apr 18, 2025
References
- https://github.com/erlang/otp/security/advisories/GHSA-37cp-fgq5-7wc2
- https://github.com/erlang/otp/commit/0fcd9c56524b28615e8ece65fc0c3f66ef6e4c12
- https://github.com/erlang/otp/commit/6eef04130afc8b0ccb63c9a0d8650209cf54892f
- https://github.com/erlang/otp/commit/b1924d37fd83c070055beb115d5d6a6a9490b891