Unrated severityNVD Advisory· Published Jul 16, 2026· Updated Jul 18, 2026
WireGuard Easy Weak Token Generation Information Disclosure via OTL Route
CVE-2026-63089
Description
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.
Affected products
1Patches
Vulnerability mechanics
References
3- github.com/wg-easy/wg-easy/commit/66b292b11bde3664f05ffb016c8082665d261dedmitrepatch
- www.vulncheck.com/advisories/wireguard-easy-weak-token-generation-information-disclosure-via-otl-routemitrethird-party-advisory
- github.com/wg-easy/wg-easy/pull/2661mitreissue-tracking
News mentions
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