How severe is CVE-2018-6911?

CVE-2018-6911 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-6911 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6911?

CVE-2018-6911 affects Advantech Webaccess. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6911?

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

When was CVE-2018-6911 published?

CVE-2018-6911 was published on 2018-02-13 and last updated on 2026-06-17.

CVE-2018-6911

CVE-2018-6911 is a critical-severity vulnerability in Advantech Webaccess with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 13% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 13% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Advantech Webaccess
Published: 2018-02-13
Last modified: 2026-06-17

Description

The VBWinExec function in Node\AspVBObj.dll in Advantech WebAccess 8.3.0 allows remote attackers to execute arbitrary OS commands via a single argument (aka the command parameter).

Frequently asked questions

What is CVE-2018-6911?: The VBWinExec function in Node\AspVBObj.dll in Advantech WebAccess 8.3.0 allows remote attackers to execute arbitrary OS commands via a single argument (aka the command parameter).
How severe is CVE-2018-6911?: CVE-2018-6911 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-6911 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6911?: CVE-2018-6911 affects Advantech Webaccess. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6911?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-6911 published?: CVE-2018-6911 was published on 2018-02-13 and last updated on 2026-06-17.

References

https://www.exploit-db.com/exploits/44031/

Affected products (1)

cpe:2.3:a:advantech:webaccess:8.3.0:*:*:*:*:*:*:*

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