CVE-2026-63089

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreHIGH confidence

Score 9.3 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-16. a secondary CVSS source baseline 9.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
EG Score
9.3(high)
EG Risk
57(Track)
EG Risk 57/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity93% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
14.9%
KEV
Not listed

Published

July 16, 2026

Last Modified

July 18, 2026

Advisory Details (3)

Auto-updated Jul 16, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
generic

WireGuard Easy Weak Token Generation Information Disclosure via OTL Route | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wireguard-easy-weak-token-generation-information-disclosure-via-otl-route
github_pr

improve security

Fix merged in wg-easy/wg-easy PR #2661 on 2026-06-12 — awaiting tagged release

https://github.com/wg-easy/wg-easy/pull/2661
github_commit

commit 66b292b11bde (wg-easy/wg-easy)

Fix landed in wg-easy/wg-easy commit 66b292b11bde — awaiting tagged release

https://github.com/wg-easy/wg-easy/commit/66b292b11bde3664f05ffb016c8082665d261ded

Vendor Advisories for CVE-2026-63089(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 15× in last 7d / 15× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 03:22 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-22 14:08 UTCEPSS rescore
  4. 2026-07-21 15:25 UTCEPSS rescore
  5. 2026-07-21 15:25 UTCEPSS rescore
  6. 2026-07-20 17:08 UTCEPSS rescore
  7. 2026-07-19 14:31 UTCEPSS rescore
  8. 2026-07-19 02:34 UTCEG score recompute
  9. 2026-07-19 02:34 UTCGHSA enrichment
  10. 2026-07-19 02:29 UTCEPSS rescore
  11. 2026-07-18 10:04 UTCEPSS rescore
  12. 2026-07-17 03:41 UTCGHSA enrichment
  13. 2026-07-16 23:43 UTCGHSA enrichment
  14. 2026-07-16 19:45 UTCEG score recompute
  15. 2026-07-16 19:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-63089?
CVE-2026-63089 is a critical vulnerability published on July 16, 2026. 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…
When was CVE-2026-63089 disclosed?
CVE-2026-63089 was first published in the National Vulnerability Database on July 16, 2026, with the most recent update on July 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63089 actively exploited?
CVE-2026-63089 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-63089?
CVE-2026-63089 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-63089?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63089, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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