Threat Intelligence / CVE / CVE-2025-32433

CVE-2025-32433 — erlang otp

CISA KEV
CVSS v3.1 10 (CRITICAL) · EPSS 97.6% (higher than 99.8% of all scored CVEs) · Priority 9/10 · Published 2025-04-16

As of 2026-02-26, CVE-2025-32433 is a CRITICAL-severity vulnerability in erlang otp, CVSS v3.1 10, EPSS 97.6% (99.8th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-06-09), with a US federal remediation deadline of 2025-06-30. Threadlinqs Intelligence links 3 tracked threat campaigns to CVE-2025-32433, most recently “The Gentlemen RaaS overtakes Qilin as #1 ransomware operation, wields GentleKiller EDR-killer framework (400+ processes, 8 BYOVD variants) and 90% affiliate payouts”.

Last updated: 2026-02-26

What is CVE-2025-32433?

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.

The record classifies CVE-2025-32433 under weakness class CWE-306. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 514 days ago.

Severity and exploitation probability

CVSS v3.1 base score
10 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS (FIRST)
97.6% probability of exploitation in the next 30 days, higher than 99.8% of all scored CVEs
CISA KEV
Listed since 2025-06-09, federal remediation deadline 2025-06-30
Threadlinqs priority
9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published
2025-04-16, last modified 2026-02-26

Is CVE-2025-32433 being exploited?

CISA added CVE-2025-32433 to the Known Exploited Vulnerabilities catalog on 2025-06-09, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2025-06-30 under BOD 22-01. Weaponised exploit code for CVE-2025-32433 is publicly available. 11 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 43 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2025-32433

The record marks a vendor fix as available for CVE-2025-32433. Patch reference: https://github.com/erlang/otp/commit/0fcd9c56524b28615e8ece65fc0c3f66ef6e4c12. Vendor advisory: https://github.com/erlang/otp/security/advisories/GHSA-37cp-fgq5-7wc2. Because CVE-2025-32433 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2025-06-30. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2025-32433

3 tracked threats in the Threadlinqs corpus reference CVE-2025-32433, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Vendor advisory and patch

Other references

Full detection coverage & IOCs for threats exploiting CVE-2025-32433 are available via the Threadlinqs MCP server (Purple tier). View plans →

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