An exploitable unsafe default configuration vulnerability exists in the TURN server function of coTURN prior to version 4.5.0.9.

published 2019-03-21 7y ago modified 2026-06-17 4mo ago also EUVD-2018-15845

cvss: 6.5; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.0%; EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits: 0; none known

An exploitable unsafe default configuration vulnerability exists in the TURN server function of coTURN prior to version 4.5.0.9. By default, the TURN server runs an unauthenticated telnet admin portal on the loopback interface. This can provide administrator access to the TURN server configuration, which can lead to additional attacks. An attacker who can get access to the telnet port can gain administrator access to the TURN server.

Patch / fix

fixed in 1 distros 2

coturn_project coturn 4.5.0.9

debian ubuntu

coturn Debian 14, Debian 13, Debian 12 4.5.1.0-1

debian advisories DEBIAN-CVE-2018-4059

coturn Ubuntu 16.04 LTS 4.5.0.3-1ubuntu0.2
coturn Ubuntu 18.04 LTS 4.5.0.7-1ubuntu2.18.04.1

ubuntu advisories UBUNTU-CVE-2018-4059

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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Exploit prediction

1.95% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.0	6.5	CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

Talos coTURN

Classification

Weakness

CWE-862 Missing Authorization

References

talosintelligence.com /vulnerability_reports/TALOS-2018-0733
mitigation, third-party-advisory

Sources

CVE List CVE-2018-4059
NVD CVE-2018-4059

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