How severe is CVE-2018-8841?

CVE-2018-8841 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-8841 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-8841?

CVE-2018-8841 primarily affects Advantech Webaccess. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-8841?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-8841 published?

CVE-2018-8841 was published on 2018-05-15 and last updated on 2026-06-17.

CVE-2018-8841

CVE-2018-8841 is a high-severity vulnerability in Advantech Webaccess with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-269.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Advantech Webaccess
Published: 2018-05-15
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2018-8841?: CVE-2018-8841 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-8841 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-8841?: CVE-2018-8841 primarily affects Advantech Webaccess. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-8841?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-8841 published?: CVE-2018-8841 was published on 2018-05-15 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:advantech:webaccess:*:*:*:*:*:*:*:*
cpe:2.3:a:advantech:webaccess_dashboard:*:*:*:*:*:*:*:*
cpe:2.3:a:advantech:webaccess_scada:*:*:*:*:*:*:*:*
cpe:2.3:a:advantech:webaccess\/nms:*:*:*:*:*:*:*:*

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