CVE intelligence

CVE-2026-70354

Vulnerability intelligence

Published Aug 11, 2026Sources checked Oct 28, 2026

7.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-70354 and is rated High severity with a CVSS score of 7.8. 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: Aug 13, 2026

Vendor remediation details

Install KB5120418. Install KB5120716. Install KB5120747. Install KB5120695. Install KB5120703. Install KB5120698. Install KB5120701. Install KB5120705. Install KB5120709. Install KB5120714. Install KB5120700. Install KB5120699. Install KB5120702. Install KB5120704. Install KB5122105. Install KB5122104. Install KB5122106. Install KB5120708. Install KB5120710. Install KB5120713. Install KB5120706. Install KB5120711.

Vendor-listed releases

2.0.50727.8984 & 3.0.30729.8980 & 4.7.4144.0
2.0.50727.8984 & 3.0.30729.8980
2.0.50727.9183 & 3.0.30729.9169
2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0
2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0
2.0.50727.9183 & 3.0.30729.9169 & 4.8.4805.0
2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0
4.7.4144.0
4.8.4805.0
18.8.3
17.14.38
9.0.19
8.0.30
10.0.11
2.0.50727.9183 & 3.0.30729.9169 & 4.8.9344.0
4.8.9344.0

CISA KEVNot listedBased on the latest collected catalog

EPSS0.4%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-70354?

Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.

Source: NVD