October 2026 Patch TuesdayKB5127687Normal patch window

Microsoft · KB5127687

Linked CVE review

Deploy Microsoft Developer Tools security update KB5127687

Linked CVEs
18
Confirmed exploited
0
PoC or lab evidence
0
Maximum CVSS
8.8
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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18 of 18 linked CVEs shown
Confirmed exploitedCVSS above 9.0
CVE and descriptionSeverityExploit realityForecast and accessRemediation
CVE-2026-70035 Scheduled assessment
.NET Framework Remote Code Execution Vulnerability

Deserialization of untrusted data in .NET Framework allows an unauthorized attacker to execute code over a network.

8.8 · CVSS 3.1 · HighSource: 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: 1.27% · 69.2th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · REQUIRED user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-83520 Scheduled assessment
.NET Remote Code Execution Vulnerability

Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code over a network.

8.8 · CVSS 3.1 · HighSource: 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: 1.27% · 69.2th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · REQUIRED user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-58280 Scheduled assessment
.NET Denial of Service Vulnerability

Uncontrolled recursion in .NET allows an unauthorized attacker to deny service over a network.

7.5 · CVSS 3.1 · HighSource: 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: 1.10% · 65.0th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · NONE user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-69651 Scheduled assessment
.NET Denial of Service Vulnerability

Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.

7.5 · CVSS 3.1 · HighSource: 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: 1.10% · 65.0th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · NONE user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-96958 Scheduled assessment
.NET Denial of Service Vulnerability

Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.

7.5 · CVSS 3.1 · HighSource: 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: 1.06% · 63.7th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · NONE user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-96960 Scheduled assessment
.NET Denial of Service Vulnerability

Asymmetric resource consumption (amplification) in .NET allows an unauthorized attacker to deny service over a network.

7.5 · CVSS 3.1 · HighSource: 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: 1.06% · 63.7th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · NONE user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-70174 Scheduled assessment
.NET Remote Code Execution Vulnerability

Improperly implemented security check for standard in .NET allows an unauthorized attacker to execute code over a network.

8.8 · CVSS 3.1 · HighSource: 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: 0.80% · 55.8th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · REQUIRED user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-84008 Scheduled assessment
.NET Denial of Service Vulnerability

Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.

7.5 · CVSS 3.1 · HighSource: 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: 0.77% · 54.5th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · NONE user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-96233 Scheduled assessment
ASP.NET Core Denial of Service Vulnerability

Out-of-bounds write in ASP.NET Core allows an unauthorized attacker to deny service over a network.

7.5 · CVSS 3.1 · HighSource: 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: 0.77% · 54.5th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · NONE user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-96959 Scheduled assessment
.NET Denial of Service Vulnerability

Allocation of resources without limits or throttling in .NET allows an unauthorized attacker to deny service over a network.

7.5 · CVSS 3.1 · HighSource: 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: 0.77% · 54.5th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · NONE user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-85363 Scheduled assessment
.NET Framework Elevation of Privilege Vulnerability

Integer overflow or wraparound in .NET Framework allows an unauthorized attacker to elevate privileges over a network.

8.8 · CVSS 3.1 · HighSource: 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: 0.74% · 53.5th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · REQUIRED user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-96224 Scheduled assessment
.NET Remote Code Execution Vulnerability

Out-of-bounds write in .NET allows an unauthorized attacker to execute code over a network.

8.8 · CVSS 3.1 · HighSource: 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: 0.74% · 53.5th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · REQUIRED user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-102869 Scheduled assessment
.NET and Visual Studio Elevation of Privilege Vulnerability

Access of resource using incompatible type ('type confusion') in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.

8.8 · CVSS 3.1 · HighSource: 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: 0.74% · 53.5th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · REQUIRED user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-97788 Scheduled assessment
Active Directory Federation Services (AD FS) Information Disclosure Vulnerability

Observable discrepancy in Active Directory Federation Services (AD FS) allows an unauthorized attacker to disclose information over a network.

7.5 · CVSS 3.1 · HighSource: 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: 0.69% · 51.8th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · NONE user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-70007 Scheduled assessment
.NET Framework Remote Code Execution Vulnerability

Out-of-bounds write in .NET Framework allows an unauthorized attacker to execute code over a network.

8.8 · CVSS 3.1 · HighSource: 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: 0.64% · 49.4th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · REQUIRED user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-97801 Scheduled assessment
.NET Framework Tampering Vulnerability

Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to perform tampering over a network.

7.5 · CVSS 3.1 · HighSource: 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: 0.61% · 47.9th percentileForecast date: 2026-10-14NETWORK · LOW complexity · NONE privileges · NONE user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-96222 Scheduled assessment
Active Directory Federation Services (AD FS) Spoofing Vulnerability

Improper certificate validation in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.

7.4 · CVSS 3.1 · HighSource: 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: 0.58% · 46.6th percentileForecast date: 2026-10-14NETWORK · HIGH complexity · NONE privileges · NONE user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-108398 Scheduled assessment
.NET Framework Security Feature Bypass Vulnerability

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

8.8 · CVSS 3.1 · HighSource: 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: 0.47% · 39.5th percentileForecast date: 2026-10-14LOCAL · LOW complexity · LOW privileges · NONE user interactionWithin 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Mitigation available. No fixed version is explicitly recorded in the structured CVE data.