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Highest advisory severityHigh 2 vendors · 2 advisories

CVE-2026-69651

.NET Denial of Service Vulnerability

CVE-2026-69651: .NET Denial of Service Vulnerability. Not in the CISA KEV catalog. High advisory severity (CVSS 7.5, MS Server).

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

NVD detail CVE.org

CVE-2026-69651 at a glance

CISA KEV
Not listed (catalog checked )
Highest advisory severity
High
CVSS base score
7.5 (MS Server), 7.5 (Red Hat)
Weakness
CWE-776
Fixed releases
  • MS Server: KB5127696 (build 2.0.50727.9188 AND 3.0.30729.9171), KB5127660 (build 2.0.50727.8987 AND 3.0.30729.8982), KB5127664 (build 2.0.50727.8987 AND 3.0.30729.8982), KB5126868 (build 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0), KB5127666 (build 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0), KB5127685 (build 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0) and 2 more in the advisory
  • Red Hat: dotnet10.0-0:10.0.113-1.el10_2, dotnet10.0-0:10.0.113-1.el9_8, dotnet9.0-0:9.0.122-1.el10_2, dotnet8.0-0:8.0.132-1.el10_2, dotnet8.0-0:8.0.132-2.el8_10, dotnet8-0-main-8.0.132-0.1.hum1 and 8 more in the advisory
Vendor advisories
2 from MS Server, Red Hat
VulniPulse record
Published · Updated

Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-69651; bulletin-wide values are not repeated here.

Is CVE-2026-69651 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-69651 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-69651?

Upgrade to a fixed release named by the vendor:

  • MS Server: KB5127696 (build 2.0.50727.9188 AND 3.0.30729.9171), KB5127660 (build 2.0.50727.8987 AND 3.0.30729.8982), KB5127664 (build 2.0.50727.8987 AND 3.0.30729.8982), KB5126868 (build 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0), KB5127666 (build 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0), KB5127685 (build 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0)
  • Red Hat: dotnet10.0-0:10.0.113-1.el10_2, dotnet10.0-0:10.0.113-1.el9_8, dotnet9.0-0:9.0.122-1.el10_2, dotnet8.0-0:8.0.132-1.el10_2, dotnet8.0-0:8.0.132-2.el8_10, dotnet8-0-main-8.0.132-0.1.hum1
  • Install the applicable security update for your platform: KB5127696, KB5127660, KB5127664, KB5126868, KB5127666, KB5127685 (see the Microsoft Update Catalog). (MS Server)

Vendor advisory comparison

MS Server

1 advisory
  • Advisory severityHigh7.5

    High [CVE-2026-69651] .NET Denial of Service Vulnerability

    CVE-2026-69651Source published

    .NET Denial of Service Vulnerability Affected products named by the advisory: Microsoft.NET Framework 3.5 on Windows Server 2012; Microsoft.NET Framework 3.5 on Windows Server 2012 R2; Microsoft.NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016; Microsoft.NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2019; and 4 more. Affected products named by the advisory: Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019; Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022; Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2.

    Affected products in this advisory
    • Microsoft .NET Framework 3.5 on Windows Server 2012 R2
    • Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016
    • Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2019
    • Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019

    2 more entries in the full advisory.

    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    • KB5127696 (build 2.0.50727.9188 AND 3.0.30729.9171)
    • KB5127660 (build 2.0.50727.8987 AND 3.0.30729.8982)
    • KB5127664 (build 2.0.50727.8987 AND 3.0.30729.8982)
    • KB5126868 (build 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0)

    4 more entries in the full advisory.

    Mitigation guidance
    • Install the applicable security update for your platform: KB5127696, KB5127660, KB5127664, KB5126868, KB5127666, KB5127685 (see the Microsoft Update Catalog).
    Full advisory and evidenceOpen source bulletin

Red Hat

1 advisory
  • Advisory severityHigh7.5

    High [CVE-2026-69651] .NET Denial of Service Vulnerability

    CVE-2026-69651Source published Source updated

    .NET Denial of Service Vulnerability. Red Hat rates this important (CVSS 7.5). Weakness: CWE-776. Red Hat lists fixing advisory RHSA-2026:86594 with package dotnet10.0-0:10.0.113-1.el10_2, dotnet10.0-0:10.0.113-1.el9_8, dotnet9.0-0:9.0.122-1.el10_2, dotnet8.0-0:8.0.132-1.el10_2. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8.

    Related products — impact not confirmed
    • Red Hat Enterprise Linux 10
    • Red Hat Enterprise Linux 9
    • Red Hat Enterprise Linux 8
    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    • dotnet10.0-0:10.0.113-1.el10_2
    • dotnet10.0-0:10.0.113-1.el9_8
    • dotnet9.0-0:9.0.122-1.el10_2
    • dotnet8.0-0:8.0.132-1.el10_2

    10 more entries in the full advisory.

    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Full advisory and evidenceOpen source bulletin

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