BlackTreeCVE IntelligenceSeptember 2026 Patch TuesdayKB5126104Normal patch window
Microsoft · KB5126104
Linked CVE review
Deploy Microsoft Developer Tools security update KB5126104
- Linked CVEs
- 5
- Confirmed exploited
- 0
- PoC or lab evidence
- 0
- Maximum CVSS
- 8.8
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.
5 of 5 linked CVEs shown
Confirmed exploitedCVSS above 9.0
| CVE and description | Severity | Exploit reality | Forecast and access | Remediation |
|---|---|---|---|---|
CVE-2026-69522 Scheduled assessment .NET and Visual Studio Remote Code Execution VulnerabilityHeap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network. | 8.8 · CVSS 3.1 · HighSource: CNA | No 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: 0.91% · 58.8th percentileForecast date: 2026-10-07NETWORK · LOW complexity · NONE privileges · REQUIRED user interaction | Within 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Patch available. 10.0.12:Security Update:https://support.microsoft.com/kb/5126106 |
CVE-2026-69439 Scheduled assessment .NET and Visual Studio Elevation of Privilege VulnerabilityHeap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network. | 8.8 · CVSS 3.1 · HighSource: CNA | No 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: 0.84% · 56.6th percentileForecast date: 2026-10-07NETWORK · LOW complexity · NONE privileges · REQUIRED user interaction | Within 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Patch available. 10.0.12:Security Update:https://support.microsoft.com/kb/5126106 |
CVE-2026-71328 Scheduled assessment .NET and Visual Studio Remote Code Execution VulnerabilityHeap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network. | 8.8 · CVSS 3.1 · HighSource: CNA | No 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: 0.76% · 53.7th percentileForecast date: 2026-10-07NETWORK · LOW complexity · NONE privileges · REQUIRED user interaction | Within 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Patch available. 18.9.3:Security Update:https://learn.microsoft.com/en-us/visualstudio/releases/2026/release-notes |
CVE-2026-69304 Scheduled assessment ASP.NET Core Denial of Service VulnerabilityImproper 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: CNA | No 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: 2026-10-07NETWORK · HIGH complexity · NONE privileges · NONE user interaction | ScheduledMedium 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 |
CVE-2026-58649 Scheduled assessment .NET Information Disclosure VulnerabilityOrigin validation error in .NET allows an unauthorized attacker to disclose information over a network. | 6.5 · CVSS 3.1 · MediumSource: CNA | No 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: 0.27% · 18.0th percentileForecast date: 2026-10-07NETWORK · LOW complexity · NONE privileges · REQUIRED user interaction | ScheduledMedium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.Patch available. For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 |