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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, 18:36 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 to affected Red Hat Enterprise Linux 10 systems as soon as possible. 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 for Red Hat Enterprise Linux contains a spoofing vulnerability identified as CVE-2025-26646. This vulnerability affects the .NET and Visual Studio components and has been rated with an important security impact by Red Hat. Updated versions .NET SDK 9.0.106 and .NET Runtime 9.0.5 have been released to address this issue. The advisory applies to multiple architectures and extended update support versions of Red Hat Enterprise Linux 10. No CVSS score is provided in the advisory.

References

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