What is CVE-2021-21911?

CVE-2021-21911 is a privilege escalation vulnerability in the Windows version of installation for Advantech R-SeeNet.

How does CVE-2021-21911 impact systems?

CVE-2021-21911 allows an attacker to escalate privileges to NT SYSTEM authority by replacing a specially-crafted file in the system.

What is the severity of CVE-2021-21911?

CVE-2021-21911 has a severity rating of 7.8 (High).

Which software versions are affected by CVE-2021-21911?

Advantech R-SeeNet version 2.4.15 is affected by CVE-2021-21911.

Is Microsoft Windows affected by CVE-2021-21911?

No, Microsoft Windows is not affected by CVE-2021-21911.

How can I fix CVE-2021-21911?

Updating Advantech R-SeeNet to a patched version is recommended to fix CVE-2021-21911.

Where can I find more information about CVE-2021-21911?

You can find more information about CVE-2021-21911 at the following link: https://talosintelligence.com/vulnerability_reports/TALOS-2021-1360

What are the Common Weakness Enumerations (CWE) associated with CVE-2021-21911?

CVE-2021-21911 is associated with CWE-269 (Improper Privilege Management) and CWE-276 (Incorrect Default Permissions).

Vulnerability/
CVE-2021-21911

high

8.8

CWE

269 276

22/12/2021

24/8/2022

CVE-2021-21911

First published: Wed Dec 22 2021(Updated: )

A privilege escalation vulnerability exists in the Windows version of installation for Advantech R-SeeNet Advantech R-SeeNet 2.4.15 (30.07.2021). 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.

Credit: talos-cna@cisco.com

Affected Software	Affected Version	How to fix
Advantech R-SeeNet	=2.4.15
Microsoft Windows

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Reference Links

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1360

Frequently Asked Questions

What is CVE-2021-21911?
CVE-2021-21911 is a privilege escalation vulnerability in the Windows version of installation for Advantech R-SeeNet.
How does CVE-2021-21911 impact systems?
CVE-2021-21911 allows an attacker to escalate privileges to NT SYSTEM authority by replacing a specially-crafted file in the system.
What is the severity of CVE-2021-21911?
CVE-2021-21911 has a severity rating of 7.8 (High).
Which software versions are affected by CVE-2021-21911?
Advantech R-SeeNet version 2.4.15 is affected by CVE-2021-21911.
Is Microsoft Windows affected by CVE-2021-21911?
No, Microsoft Windows is not affected by CVE-2021-21911.
How can I fix CVE-2021-21911?
Updating Advantech R-SeeNet to a patched version is recommended to fix CVE-2021-21911.
Where can I find more information about CVE-2021-21911?
You can find more information about CVE-2021-21911 at the following link: https://talosintelligence.com/vulnerability_reports/TALOS-2021-1360
What are the Common Weakness Enumerations (CWE) associated with CVE-2021-21911?
CVE-2021-21911 is associated with CWE-269 (Improper Privilege Management) and CWE-276 (Incorrect Default Permissions).

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canonical/advantech r-seenet
version/advantech r-seenet/2.4.15
vendor/microsoft
canonical/microsoft windows

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