CVE-2026-63089

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.

CVSS v3 9.3 CRITICAL

9.3^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/wg-easy/wg-easy/commit/66b292b11bde3664f05ffb016c8082665d261ded
https://github.com/wg-easy/wg-easy/pull/2661
https://www.vulncheck.com/advisories/wireguard-easy-weak-token-generation-information-disclosure-via-otl-route

Configurations

No configuration.

History

16 Jul 2026, 20:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-16 20:16

Updated : 2026-07-18 03:16

NVD link : CVE-2026-63089

Mitre link : CVE-2026-63089

CVE.ORG link : CVE-2026-63089

JSON object : View

Products Affected

No product.

CWE

CWE-338

Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

CWE-613

Insufficient Session Expiration

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