No exploitation reported

CVE-2018-7544

No exploitation reported by the sources we read.

Published2018-03-16
WeaknessCWE-134

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a "signal SIGTERM" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning

Timeline

dates in UTC

2018-03-1615:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-7544?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-7544?format=csv
TAXII collection of exploited CVEs
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Versions per branch

NVD

Openvpn

Branch	Affected	Fixed in	Source
2.4	≤ 2.4.5	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2024-11-14
OpenCVESSVC decisionnone—
NVDCVSS 3.09.1read 2026-10-23
NVDCVSS 2.06.4read 2026-10-23
NVDweakness (CWE)CWE-134read 2026-10-23
FIRST EPSSEPSS score1.8 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Published: 2018-03-16
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2018-7544?

Is CVE-2018-7544 actively exploited?

Active exploitation of CVE-2018-7544 has not been confirmed. Its EPSS score was 1.8% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-7544?

CVE-2018-7544 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

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