CVE-2026-63089

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.41% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 35.4% of scored records. A rank, not a probability.

NVD base score

9.0 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-07-18.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-07-16 19:28Z3 MO AGO

Last updated

2026-07-18 03:08Z3 MO AGO

Reserved

2026-07-15

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Critical (CVSS 9.0)

CNA CVSS vector

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

Weaknesses

• CWE-338Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)Base
• CWE-613Insufficient Session ExpirationBase

Data version

5.2

Document digest

14079a1ebf2e5b75e6637a46211da5d7cf3e49b32a38ef654244e58a60096c60

• github.comPull Requesthttps://github.com/wg-easy/wg-easy/pull/2661issue-tracking
• github.comPatch Commithttps://github.com/wg-easy/wg-easy/commit/66b292b11bde3664f05ffb016c8082665d261dedpatch
• www.vulncheck.comhttps://www.vulncheck.com/advisories/wireguard-easy-weak-token-generation-information-disclosure-via-otl-routethird-party-advisory