Type Vulnerability
A vulnerability in Microsoft ActiveX Installer Service could allow an authorised attacker to elevate privileges locally.
Microsoft · Privilege escalation
Microsoft ActiveX Installer Service Elevation of Privilege Vulnerability
CVE-2026-96158
What this means
This is rated high severity (7 out of 10). There is no confirmed exploitation of it yet. Ask IT whether the affected products are in your estate.
Full vendor description
Use of uninitialized resource in Microsoft ActiveX Installer Service allows an authorized attacker to elevate privileges locally.
Scoring and exploitation
7.0/ 10
CVSS 3.1 base scoreHigh
Exploitable only with local access and a low-privilege account, under specific conditions, and no one has to click or open anything. High impact on confidentiality, integrity and availability.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitability
Longer bar: easier to attack
Attack vectorLocalAV:L
Attack complexityHighAC:H
Privileges requiredLowPR:L
User interactionNoneUI:N
ScopeUnchangedS:U
Impact
Longer bar: more harm
ConfidentialityHighC:H
IntegrityHighI:H
AvailabilityHighA:H
- Not reported
- Exploited in the wild
- Not confirmed in the
- Not reported
Weaknesses
CWE-362CWE-908
References
1 link from the CVE record, grouped by site.
msrc.microsoft.com1 link