What is CVE-2021-40396?

CVE-2021-40396 is a high-severity vulnerability in Advantech Deviceon\/iservice, classified under Incorrect Default Permissions. CVSS score: 8.8/10. Published 2022-01-28.

How severe is CVE-2021-40396?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Advantech Deviceon\/iservice

CVE-2021-40396

A privilege escalation vulnerability exists in the installation of Advantech DeviceOn/iService 1.1.7. A specially-crafted file can be replaced in the system to escalate privileges to NT SYSTEM authority. An attacker can provide a malicious file to trigger this vulnerability.

EPSS: 0.004 (29.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Advantech Deviceon\/iservice — versions 1.1.7
N/a — versions n/a

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

References

talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-40396?: CVE-2021-40396 is a high-severity vulnerability in Advantech Deviceon\/iservice, classified under Incorrect Default Permissions. CVSS score: 8.8/10. Published 2022-01-28.
How severe is CVE-2021-40396?: High severity. CVSS v3 base score is 8.8 out of 10.