HOMEVULNERABILITIESCVE-2018-8841
HIGH

CVE-2018-8841

CWE-269Published: May 15, 2018· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2018-8841 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

advantech4 product(s)
webaccesswebaccess dashboardwebaccess scadawebaccess\/nms
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://www.securityfocus.com/bid/104190
ADVISORYhttps://ics-cert.us-cert.gov/advisories/ICSA-18-135-01
ADVISORYhttp://www.securityfocus.com/bid/104190
ADVISORYhttps://ics-cert.us-cert.gov/advisories/ICSA-18-135-01

All References (4)

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

Quick Facts

CVE IDCVE-2018-8841
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-269
CISA KEVNo
Affected1 vendor(s)
PublishedMay 15, 2018

Related CVEs (CWE-269)

CVE-2018-4310
10.0
CVE-2021-1388
10.0
CVE-2025-0505
10.0
CVE-2026-31852
10.0
CVE-2020-27655
10.0
CVE-2024-6240
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-8841 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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