CVE-2018-8841

In Advantech WebAccess versions V8.2_20170817 and prior, WebAccess versions V8.3.0 and prior, WebAccess Dashboard versions V.2.0.15 and prior, WebAccess Scada Node versions prior to 8.3.1, and WebAccess/NMS 2.0.3 and prior, an improper privilege management vulnerability may allow an authenticated user to modify files when read access should only be given to the user.

Published: 2018-05-15 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-8841 is rated Moderate Risk (41.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.36%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-8841

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.10% 0.36% +0.26%
2 2025-03-17 0.05% 0.10% +0.05%
3 2023-03-07 — 0.05% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-8841

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.0 HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
4.6 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 6.4 [email protected]

Weakness enumeration for CVE-2018-8841

Affected software / configurations for CVE-2018-8841

Vendor Product Version Raw CPE
advantech webaccess <= 8.2_20170817 cpe:2.3:a:advantech:webaccess:*:*:*:*:*:*:*:*
advantech webaccess <= 8.3.0 cpe:2.3:a:advantech:webaccess:*:*:*:*:*:*:*:*
advantech webaccess_dashboard <= 2.0.15 cpe:2.3:a:advantech:webaccess_dashboard:*:*:*:*:*:*:*:*
advantech webaccess_scada < 8.3.1 cpe:2.3:a:advantech:webaccess_scada:*:*:*:*:*:*:*:*
advantech webaccess\/nms <= 2.0.3 cpe:2.3:a:advantech:webaccess\/nms:*:*:*:*:*:*:*:*

References for CVE-2018-8841

URL Tags
http://www.securityfocus.com/bid/104190 Third Party Advisory VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-135-01 Third Party Advisory US Government Resource
cvelogic Threat Intelligence