wg-easy WireGuard Easy up to 15.3.0 Token Generation random values

Summaryinfo

A vulnerability identified as problematic has been detected in wg-easy WireGuard Easy up to 15.3.0. Affected by this issue is some unknown functionality of the component Token Generation. This manipulation causes random values. This vulnerability appears as CVE-2026-63089. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability has been found in wg-easy WireGuard Easy up to 15.3.0 and classified as problematic. Affected by this vulnerability is some unknown functionality of the component Token Generation. The manipulation with an unknown input leads to a random values vulnerability. The CWE definition for the vulnerability is CWE-330. The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers. As an impact it is known to affect confidentiality. The summary by CVE is:

WireGuard Easy through 15.3.0, fixed in commit 66b292b, contains a cryptographically weak one-time link token generation vulnerability that allows unauthenticated network attackers to recover WireGuard peer credentials by brute-forcing a keyspace of at most 1000 candidate tokens per client ID, as the token is computed using CRC32 over a random value constrained to 0-999. Attackers can enumerate candidate tokens against the unauthenticated /cnf/:oneTimeLink route, which lacks rate limiting and does not validate token expiration, to obtain a peer's PrivateKey and PresharedKey and impersonate that peer on the VPN network.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-63089 since 07/15/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600.001 for this issue.

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

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• wg-easy

Name

• WireGuard 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

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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