CVE-2026-97381
CRITICAL
9,9
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: high
Description
AI Translation Available
Legacy Update is a tool for activating and installing updates on legacy Windows PCs. Legacy Update 1.12.0 through 1.13.1 contains an origin validation error in the IsPermitted method of its ActiveX control. After successfully reading the hosting document's hostname, a hostname that is not on the permitted list falls through without setting E_ACCESSDENIED, causing IsPermitted to return S_OK. An attacker who induces a user to visit a malicious webpage in Internet Explorer can invoke the control to enumerate update and system information, install updates without consent, display dialogs, or restart the computer when a reboot is pending. This issue was fixed in Legacy Update 1.13.2.
346
Origin Validation Error
DraftCommon Consequences
Security Scopes Affected:
Access Control
Other
Potential Impacts:
Gain Privileges Or Assume Identity
Varies By Context
Applicable Platforms
Technologies:
Not Technology-Specific, Web Based
393
Return of Wrong Status Code
DraftCommon Consequences
Security Scopes Affected:
Integrity
Other
Potential Impacts:
Unexpected State
Alter Execution Logic
Applicable Platforms
All platforms may be affected
https://github.com/LegacyUpdate/LegacyUpdate/commit/7d62f0bfaa770d74cd6e2cb0bac…
https://github.com/LegacyUpdate/LegacyUpdate/commit/ae1c46c97f39a55a1937784d9f9…
https://github.com/LegacyUpdate/LegacyUpdate/releases/tag/v1.13.2.0
https://github.com/LegacyUpdate/LegacyUpdate/security/advisories/GHSA-f4g7-4gmx…
https://legacyupdate.net/news/2026/07/21/legacy-update-1-13-2