CVE-2026-63089
WireGuard Easy Weak Token Generation Information Disclosure via OTL Route
- State
- Published
- Severity
- 9.0 Critical
- Published
- Jul 16, 2026
- Updated
- Jul 18, 2026
- Reserved
- Jul 15, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.0 Critical | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:L/SA:N | VulnCheck |
| 3.1 | 9.3 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N | VulnCheck |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
wg-easywg-easy |
|
References
- Pull Requestissue-tracking
- Patch Commitpatch
- https://www.vulncheck.com/advisories/wireguard-easy-weak-token-generation-information-disclosure-via-otl-routethird-party-advisory
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