RCE in Rconfig
CVE-2026-77915
rConfig Core 8.0.0 before 8.2.10 contains an authentication bypass vulnerability that allows unauthenticated attackers to self-register accounts with full Administrator privileges due to a duplicate bare Auth::routes() call in routes/web.php that re-enables the POST /register route after it was explicitly disabled. Attackers can register a new account that is immediately authenticated with Admin-level access because the registration controller does not assign a role and the users.role column defaults to Admin, enabling access to stored device credentials, user data, and API token issuance.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (54.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.3% 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: 0.008 · change: +0.004
Affected products
Weakness classification (CWE)
References
- github.com/rconfig/rconfig/security/advisories/GHSA-w3hx-9cxg-5ccr (vendor-advisory)
- github.com/rconfig/rconfig/releases (release-notes)
- www.vulncheck.com/advisories/rconfig-unauthorized-admin-registration-via-web-php (third-party-advisory)
Frequently asked questions
- What is CVE-2026-77915?
- CVE-2026-77915 is a critical-severity vulnerability in Rconfig, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-08-24.
- How severe is CVE-2026-77915?
- Critical severity. CVSS v3 base score is 9.8 out of 10.