wg-easy up to 15.3.0 client name os command injection

Summaryinfo

A vulnerability classified as very critical was found in wg-easy up to 15.3.0. Affected by this vulnerability is an unknown functionality. The manipulation of the argument client name results in os command injection. This vulnerability is known as CVE-2026-72603. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as very critical has been found in wg-easy up to 15.3.0. Affected is an unknown function. The manipulation of the argument client name with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An OS command injection vulnerability in wg-easy 15.3.0 allows users with the clients.create permission to execute arbitrary commands as root by injecting newline-delimited WireGuard PostUp directives into the client name field. The client name is written to the WireGuard configuration file without neutralizing newline characters, allowing injection of arbitrary directives that are executed by wg-quick with root privileges. An attacker with clients.create permission achieves root code execution on the host.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-72603 since 08/10/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/11/2026). The MITRE ATT&CK project declares the attack technique as T1202.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-56042). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

• wg-easy

Version

• 15.0
• 15.1
• 15.2
• 15.3.0

CPE 2.3info

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CPE 2.2info

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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