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CVE-2025-7326VulnerabilityPublished Updated

CVE-2025-7326: Microsoft ASP.NET Core 6.0 · Weak Authentication

Affects Microsoft ASP.NET Core 6.0Source CVE Database V5

0

Not known to be exploited · CVSS 7.0 High · end of life, no fix coming : replace or isolate Microsoft ASP.NET Core 6.0; no fix will be released.

Data as of 26 Oct 2026, 08:30 UTC

CVSS 3.1 base score
7.0High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 53% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
None coming – the product is end of life
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Jul 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

No fix will be released: Microsoft ASP.NET Core 6.0 is end of life. Replace it, or isolate it from untrusted networks until you can.

Affected software

ProductAffectedFixed in
NuGetmicrosoft.aspnetcore.apppkg:nuget/microsoft.aspnetcore.appOther threatsAffected
  • >=6.0.0
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Given the absence of official patches from Microsoft for ASP.NET Core 6.0, European organizations should prioritize the following specific mitigation strategies: 1) Immediate upgrade to a supported version of ASP.NET Core (e.g., ASP.NET Core 7.0 or later) that receives security updates and support. 2) Implement network-level protections such as Web Application Firewalls (WAFs) with custom rules to detect and block suspicious authentication attempts or privilege escalation patterns. 3) Employ strict network segmentation to isolate legacy ASP.NET Core 6.0 applications from critical infrastructure and sensitive data stores, limiting the blast radius of any compromise. 4) Enhance monitoring and logging to detect anomalous authentication or privilege escalation activities, enabling rapid incident response. 5) Use multi-factor authentication (MFA) and strong identity and access management (IAM) controls around administrative interfaces and services interacting with ASP.NET Core applications. 6) Conduct thorough application code reviews and penetration testing focused on authentication flows to identify and remediate weak points. 7) If immediate upgrade is not feasible, consider temporary compensating controls such as disabling unnecessary services, restricting inbound network access to trusted IPs, and applying strict firewall rules. 8) Maintain an incident response plan tailored to web application attacks and privilege escalation scenarios. These measures go beyond generic advice by focusing on compensating controls and proactive detection in the absence of vendor patches.

Description

Weak authentication in EOL ASP.NET Core allows an unauthorized attacker to elevate privileges over a network. NOTE: This CVE affects only End Of Life (EOL) software components. The vendor, Microsoft, has indicated there will be no future updates nor support provided upon inquiry.

References

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