3.7

CVE-2025-46712: erlang otp Expected Behavior Violation

CVSS: 3.7v3.1LowDeferred
AliasesUBUNTU-CVE-2025-46712DEBIAN-CVE-2025-46712
Published 08-05-2025Last modified 12-01-2026
Open JSON

Vulnerability summary

CVE-2025-46712 is a low (CVSS 3.7) Expected Behavior Violation vulnerability in erlang otp. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 44.3% of scored vulnerabilities.

Overall risk
15/100
0100
Low · default modelHow is this calculated?
CVSS score
3.7/10
010
Low · v3.1 (CVE.org)
EPSS score
0.54%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
USN-7656-1

Timeline

  1. 08-05-2025
    PublishedVulnerability first disclosed.
  2. 12-01-2026
    Last modifiedVulnerability information updated.

Description

Erlang/OTP is a set of libraries for the Erlang programming language. In versions prior to OTP-27.3.4 (for OTP-27), OTP-26.2.5.12 (for OTP-26), and OTP-25.3.2.21 (for OTP-25), Erlang/OTP SSH fails to enforce strict KEX handshake hardening measures by allowing optional messages to be exchanged. This allows a Man-in-the-Middle attacker to inject these messages in a connection during the handshake. This issue has been patched in versions OTP-27.3.4 (for OTP-27), OTP-26.2.5.12 (for OTP-26), and OTP-25.3.2.21 (for OTP-25).

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.54%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

+0.02 pp

From 0.52% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.54%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • erlang< 1:25.2.3+dfsg-1+deb12u2 | < 1:27.3.4+dfsg-1
Erlang1 product
  • otp≥ OTP 27.0, < OTP 27.3.4 (No fix recorded) | ≥ OTP 26.2.1, < OTP 26.2.5.12 (No fix recorded) | < OTP 25.3.2.21
Ubuntu1 product
  • erlangAll versions (No fix recorded) | < 1:24.2.1+dfsg-1ubuntu0.5 | < 1:25.3.2.8+dfsg-1ubuntu4.4 | < 1:27.3.4.1+dfsg-1

3 vendors · 3 products

References

10 links