# CVE-2026-63089

## Summary

- **CVE ID:** CVE-2026-63089
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (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)
- **CWE:** CWE-338, CWE-613
- **Published:** Jul 16, 2026
- **Last Modified:** Jul 18, 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.

## Affected Products

- wg-easy — wg-easy (0)
- wg-easy — wg-easy (66b292b11bde3664f05ffb016c8082665d261ded)

## References

- [CNA](https://github.com/wg-easy/wg-easy/pull/2661)
- [CNA](https://github.com/wg-easy/wg-easy/commit/66b292b11bde3664f05ffb016c8082665d261ded)
- [CNA](https://www.vulncheck.com/advisories/wireguard-easy-weak-token-generation-information-disclosure-via-otl-route)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.41%
- **EPSS Percentile:** 34.8

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._