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CVE-2026-92761— WebVirtCloud Missing Authorization on Instance Control Actions

Quick assessment

Affected
retspen webvirtcloud
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WebVirtCloud 未能正确验证 UserInstance 授权中的权限标志，使得仅具备“查看”权限的用户能够执行特权操作。拥有只读授权的攻击者可以利用仅检查授权存在的 get_instance 门控机制，从而执行以下操作：关闭虚拟机、重置 root 密码、安装 SSH 密钥以及管理 ISO 镜像。

CVSS 8.8 · High EPSS 0.61% · P49

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
retspen webvirtcloud 1b2da68b2800f94674dd96f4a986cde30ac88280 affected
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I. Basic Information for CVE-2026-92761

Vulnerability Information
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Vulnerability Title
WebVirtCloud Missing Authorization on Instance Control Actions
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
retspen webvirtcloud 1b2da68b2800f94674dd96f4a986cde30ac88280 -

II. Public POCs for CVE-2026-92761

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-92761

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Other References for CVE-2026-92761 (3)

IV. Related Vulnerabilities

Same weakness: CWE-862

V. Comments for CVE-2026-92761

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