What is CVE-2018-6911?

CVE-2018-6911 is a critical-severity vulnerability in Advantech Webaccess, classified under OS Command Injection. CVSS score: 9.8/10. Published 2018-02-13.

How severe is CVE-2018-6911?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Advantech Webaccess

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).

Vulnerability class: Command Injection (OS Command Injection)

Published 2018-02-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.128 (96.2th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.128 · newest: 0.128 · change: 0.000

Affected products

Advantech Webaccess — versions 8.3.0

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

www.exploit-db.com/exploits/44031/ (Exploit, VDB Entry, Third Party Advisory, exploit)

Frequently asked questions

What is CVE-2018-6911?: CVE-2018-6911 is a critical-severity vulnerability in Advantech Webaccess, classified under OS Command Injection. CVSS score: 9.8/10. Published 2018-02-13.
How severe is CVE-2018-6911?: Critical severity. CVSS v3 base score is 9.8 out of 10.