What is CVE-2026-92761?

CVE-2026-92761 is a high-severity vulnerability in Retspen Webvirtcloud, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-09-16.

How severe is CVE-2026-92761?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Retspen Webvirtcloud

CVE-2026-92761

WebVirtCloud fails to properly validate permission flags in UserInstance grants, allowing view-only users to perform privileged actions. Attackers with read-only grants can power off virtual machines, reset root passwords, install SSH keys, and manage ISO images by exploiting the get_instance gate that only checks grant existence.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Retspen Webvirtcloud — versions 1b2da68b2800f94674dd96f4a986cde30ac88280

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-92761?: CVE-2026-92761 is a high-severity vulnerability in Retspen Webvirtcloud, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-09-16.
How severe is CVE-2026-92761?: High severity. CVSS v3 base score is 8.8 out of 10.