What is CVE-2019-3975?

CVE-2019-3975 is a critical-severity vulnerability in Advantech Webaccess, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-09-10.

How severe is CVE-2019-3975?

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

Is CVE-2019-3975 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Advantech Webaccess

CVE-2019-3975

Stack-based buffer overflow in Advantech WebAccess/SCADA 8.4.1 allows a remote, unauthenticated attacker to execute arbitrary code via a crafted IOCTL 70603 RPC message.

Vulnerability class: Buffer Overflow

EPSS: 0.046 (90.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Advantech Webaccess — versions 8.4.1
Advantech Webaccess/scada — versions 8.4.1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

vulnreport@tenable.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2019-3975?: CVE-2019-3975 is a critical-severity vulnerability in Advantech Webaccess, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-09-10.
How severe is CVE-2019-3975?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2019-3975 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.