What is CVE-2026-66677?

CVE-2026-66677 is a high-severity vulnerability in Vaultdweller Leyka, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 7.6/10. Published 2026-08-20.

How severe is CVE-2026-66677?

High severity. CVSS v3 base score is 7.6 out of 10.

Vulnerability in Vaultdweller Leyka

CVE-2026-66677

Subscriber Broken Authentication in Leyka <= 3.32.3 versions.

Published 2026-08-20 · last modified 2026-08-20.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L.

EPSS exploit prediction

EPSS: 0.004 (30.6th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Vaultdweller Leyka

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

References

patchstack.com/database/wordpress/plugin/leyka/vulnerability/wordpress-leyka-pl… (vdb-entry)

Frequently asked questions

What is CVE-2026-66677?: CVE-2026-66677 is a high-severity vulnerability in Vaultdweller Leyka, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 7.6/10. Published 2026-08-20.
How severe is CVE-2026-66677?: High severity. CVSS v3 base score is 7.6 out of 10.