CVE intelligence

CVE-2026-108398

Vulnerability intelligence

Published Oct 13, 2026Sources checked Oct 21, 2026

8.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-108398 and is rated High severity with a CVSS score of 8.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Oct 13, 2026

Vendor remediation details

Install KB5126868. Install KB5127666. Install KB5127685. Install KB5127683. Install KB5127687. Install KB5127667. Install KB5127668. Install KB5127684. Install KB5127686. Install KB5127688. Install KB5127689. Install KB5127690. Install KB5127691. Install KB5127692. Install KB5127693. Install KB5127694.

Vendor-listed releases

2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0
2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0
2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.4811.0
4.7.4150.0
4.8.4811.0
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0
4.8.9363.0
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.10008.0

CISA KEVNot listedBased on the latest collected catalog

EPSS0.5%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-108398?

Untrusted search path in .NET Framework allows an authorized attacker to bypass a security feature locally.

Source: NVD