Track vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
9.9
CVE-2026-97381: Legacy Update can be used to install updates without consent
CVE-2026-97381 · published today
Summary
Legacy Update versions 1.12.0 through 1.13.1 allow a malicious web page to control the ActiveX component, letting it gather system details, show dialogs, and install or trigger updates without the user's permission. This could let an attacker cause a computer to reboot or change its configuration. Upgrade to version 1.13.2 or later to stop the problem.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| legacyupdate | legacyupdate | >= 1.12.0, < 1.13.2 |
Original advisory text
Legacy Update ActiveX control accepts unauthorized hosting origins
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.
References
- https://github.com/LegacyUpdate/LegacyUpdate/commit/7d62f0bfaa770d74cd6e2cb0bac9... Patch
- https://legacyupdate.net/news/2026/07/21/legacy-update-1-13-2 URL
- https://github.com/LegacyUpdate/LegacyUpdate/commit/ae1c46c97f39a55a1937784d9f9b... Patch
- https://github.com/LegacyUpdate/LegacyUpdate/releases/tag/v1.13.2.0 URL
- https://github.com/LegacyUpdate/LegacyUpdate/security/advisories/GHSA-f4g7-4gmx-... Vendor Advisory
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97381... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-97381 Vendor Advisory
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker full control (estimated)
Type
CWE-346Origin Validation Error
CWE-393Return of Wrong Status Code
Timeline
Published13 Oct 2026
Updated14 Oct 2026
First seen13 Oct 2026
Track software like this
Free during beta