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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, 18:37 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 official updates that fix this vulnerability: .NET SDK 9.0.106 and .NET Runtime 9.0.5. Users should apply these updates as per Red Hat's guidance available at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official patches.

Description

.NET 9.0 has a security vulnerability related to spoofing in .NET and Visual Studio, identified as CVE-2025-26646. Red Hat has released updated versions .NET SDK 9.0.106 and .NET Runtime 9.0.5 to address this issue. The vulnerability is rated with high severity by Red Hat Product Security. The update is available for multiple Red Hat Enterprise Linux 9 variants and architectures.

References

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