CVE-2021-40396 — HIGH (8.8)

Vulnerability Description

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.

CVSS Score

8.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Advantech	Deviceon\/Iservice	1.1.7

Related Weaknesses (CWE)

CWE-276

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1408ExploitThird Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1408ExploitThird Party Advisory

FAQ

What is CVE-2021-40396?

CVE-2021-40396 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 authori...

How severe is CVE-2021-40396?

CVE-2021-40396 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-40396?

Check the references section above for vendor advisories and patch information. Affected products include: Advantech Deviceon\/Iservice.