CVE-2026-72603Network attack vectorHinoki check available

Root command execution via newline-injected PostUp directives

Published Aug 11, 2026 · Updated Aug 11, 2026

OS command injection in wg-easy 15.3.0 allows remote authenticated users to execute arbitrary commands as root through a crafted client name. Client creation writes newline characters from the name into WireGuard configuration, where they introduce PostUp directives that wg-quick executes. The clients.create permission is required, and successful exploitation grants root code execution on the Linux host.

CVSS severity9.9
Critical
EPSS probability2.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

OS command injection in wg-easy 15.3.0 allows remote authenticated users to execute arbitrary commands as root through a crafted client name. Client creation writes newline characters from the name into WireGuard configuration, where they introduce PostUp directives that wg-quick executes. The clients.create permission is required, and successful exploitation grants root code execution on the Linux host.

The record

CVE
CVE-2026-72603
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
wg-easy
Product
wg-easy
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=15.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

wg-easy · wg-easyversion=0 <=15.3.0

Published CVSS scores

9.9TuranSecCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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