CVE-2021-35223 Execute Command Function Allows Remote Code Execution (RCE)Vulnerability

What is CVE-2021-35223?

CVE-2021-35223 is a high-severity command injection vulnerability in Solarwinds Serv-U, published on 31 Aug 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The Serv-U File Server allows for events such as user login failures to be audited by executing a command. This command can be supplied with parameters that can take the form of user string variables, allowing remote code execution.

Weakness: CWE-20

Which versions are affected by CVE-2021-35223?

It affects 1 product.

Products include Solarwinds Serv-U.

How do I fix CVE-2021-35223?

No fix has been published for CVE-2021-35223 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2021-35223 being exploited?

There is no known exploitation of CVE-2021-35223 in the wild and no public exploit code.

Other vulnerabilities in Solarwinds Serv-U

• CVE-2021-35211 SolarWinds Serv-U Remote Code Execution Exploited Critical 9.0
• CVE-2024-28995 SolarWinds Serv-U Path Traversal Vulnerability Exploited High 8.6
• CVE-2026-28318 SolarWinds Serv-U Uncontrolled Resource Consumption Exploited High 7.5
• CVE-2021-35247 SolarWinds Serv-U Improper Input Validation Exploited Medium 4.3
• CVE-2020-35481 Code injection in n/a Critical 9.8

All Solarwinds Serv-U vulnerabilities

Sources

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

Also known as GHSA-7822-xr7f-c5pr.