BlackTreeCVE Intelligence
September 2026 Patch TuesdayMSRC-2026-09-developer-tools-11-0-rc1Normal patch window

Microsoft · MSRC-2026-09-developer-tools-11-0-rc1

Linked CVE review

Deploy Microsoft Developer Tools update for ASP.NET Core 11.0

Linked CVEs
1
Confirmed exploited
0
PoC or lab evidence
0
Maximum CVSS
5.9
Evidence is kept separate

Confirmed exploitation, public exploit material, EPSS probability and CVSS severity answer different questions. “No confirmation recorded” means the checked sources do not currently confirm exploitation. It is not proof that exploitation has not occurred.

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1 of 1 linked CVEs shown
Confirmed exploitedCVSS above 9.0
CVE and descriptionSeverityExploit realityForecast and accessRemediation
CVE-2026-69304 Scheduled assessment
ASP.NET Core Denial of Service Vulnerability

Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.

5.9 · CVSS 3.1 · MediumSource: CNANo confirmation recordedNo CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.None recordedNo exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.EPSS: 0.88% · 57.7th percentileForecast date: 2026-10-08NETWORK · HIGH complexity · NONE privileges · NONE user interactionScheduledMedium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.Patch available. 11.0 RC1:Security Update