Advantech WebAccess 8.3.1 and earlier has a path traversal vulnerability which may allow an attacker to execute arbitrary code.

published 2018-10-23 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-6690

cvss: 9.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 4.8%; EPSS 4.8% chance of exploitation in 30 days, percentile 91%
public exploits: 0; none known

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-18-296-01 updated 2018-10-23 cvss 9.8

Advantech WebAccess

Advantech WebAccess <= 8.3.1
affected: vendor fix

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

4.78% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

Advantech Advantech WebAccess

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

securitytracker.com /id/1041939
vdb-entry, third-party-advisory
ics-cert.us-cert.gov /advisories/ICSA-18-296-01%2C
securityfocus.com /bid/105728
vdb-entry, third-party-advisory

Sources

CVE List CVE-2018-14806
NVD CVE-2018-14806

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary