PatchSiren cyber security CVE debrief

CVE-2026-62902 Microsoft CVE debrief

A .NET Information Disclosure Vulnerability exists due to the inclusion of functionality from an untrusted control sphere in .NET, allowing an unauthorized attacker to disclose information over a network. This vulnerability affects multiple .NET and Microsoft Visual Studio versions. The vulnerability supports potential information disclosure consequences over the network. Defenders responsible for .NET and Microsoft Visual Studio deployments should assess exposure and prioritize patching. Evidence limits exist as specific exploitation details are not provided. Review official advisories for affected versions and patches.

Vendor: Microsoft
Product: .NET 8.0
CVSS: MEDIUM 6.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-08-11
Original CVE updated: 2026-10-08
Advisory published: 2026-08-11
Advisory updated: 2026-10-08

Who should care

Defenders responsible for .NET and Microsoft Visual Studio deployments should assess exposure and prioritize patching to prevent potential information disclosure.

Why it matters

Defenders should care about CVE-2026-62902 because it allows unauthorized information disclosure over the network in .NET and Microsoft Visual Studio deployments. Roles responsible for .NET and Microsoft Visual Studio inventory and patch management should assess exposure. The vulnerability supports potential information disclosure consequences. Evidence limits exist as specific exploitation and impact details are not provided.

Potential information disclosure over the network
Need to verify inventory of .NET and Microsoft Visual Studio installations
Patching required to prevent vulnerability exploitation
Potential impact on confidentiality

Technical summary

The .NET Information Disclosure Vulnerability occurs due to the inclusion of functionality from an untrusted control sphere in .NET, allowing an unauthorized attacker to disclose information over a network. Affected products include .NET 8.0, .NET 9.0, Microsoft Visual Studio 2022 version 17.14, and Microsoft Visual Studio 2026 version 18.8.

Defensive priority

Defenders should prioritize patching affected .NET and Microsoft Visual Studio versions to prevent potential information disclosure.

Recommended defensive actions

Patch affected .NET 8.0 versions to 8.0.30 or later
Patch affected .NET 9.0 versions to 9.0.19 or later
Patch affected Microsoft Visual Studio 2022 version 17.14 to 17.14.38 or later
Patch affected Microsoft Visual Studio 2026 version 18.8 to 18.8.3 or later
Verify inventory of .NET and Microsoft Visual Studio installations

Evidence notes

The CVE record and source item provide details on the vulnerability, but do not specify exploitation or impact. Affected versions and patches are noted.

Sources and references

Verified primary and authoritative sources

CVE-2026-62902 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-62902

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-62902 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-62902

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

.NET Information Disclosure Vulnerability
Unverified legacy reference

URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/62xxx/CVE-2026-62902.json

cve_program_cvelist_v5
Source reference
Unverified legacy reference

URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62902

Supplemental source - vendor-advisory, patch

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.