CVE-2021-21912 Privilege escalation in Advantech

What is CVE-2021-21912?

CVE-2021-21912 is a high-severity vulnerability in Advantech, published on 22 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-276

Which versions are affected by CVE-2021-21912?

It affects 1 product.

Products include Advantech R-Seenet.

How do I fix CVE-2021-21912?

No fix has been published for CVE-2021-21912 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-21912 being exploited?

There is no known exploitation of CVE-2021-21912 in the wild and no public exploit code.

Other vulnerabilities in Advantech

• CVE-2023-5642 Advantech R-SeeNet Unauthenticated Read/Write Critical 9.8
• CVE-2023-2611 Advantech R-SeeNet Use of Hard-coded Credentials Critical 9.8
• CVE-2022-3385 Memory corruption in R-SeeNet Critical 9.8
• CVE-2022-3386 Memory corruption in R-SeeNet Critical 9.8
• CVE-2021-21805 Command injection in Advantech Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-4m8w-whg9-q7f6.