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CVE-2025-26646VulnerabilityPublished Updated

Red Hat Security Advisory: .NET 9.0 security update

Affects Red Hat .NET 9.0Source GCVE Database

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Not known to be exploited.

Data as of 5 Nov 2026, 18:47 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 14 May 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

AI-suggested

Red Hat has released fixed versions: .NET SDK 9.0.106 and .NET Runtime 9.0.5. Users should apply these updates promptly to remediate the spoofing vulnerability. Detailed update instructions are available in the Red Hat advisory article (https://access.redhat.com/articles/11258). No additional mitigation steps are indicated beyond applying the official patches.

Description

.NET 9.0 on Red Hat Enterprise Linux contains a spoofing vulnerability identified as CVE-2025-26646. This vulnerability affects the .NET SDK 9.0.106 and .NET Runtime 9.0.5 versions. Red Hat has released security updates to address this issue, rated as Important in severity. The flaw relates to spoofing in .NET and Visual Studio components.

References

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