Quick answers
- Is CVE-2026-114148 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-114148 being exploited in the wild.
- How severe is CVE-2026-114148?
- High severity, with a CVSS score of 7.8, published 29 October 2026.
- Which products and versions are affected?
- Microsoft ASP.NET Core.
- Is there a fix for CVE-2026-114148?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-114148 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-114148?
- Check whether you run Microsoft Asp.Net Core. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability stems from incorrect default permissions in ASP.NET Core that fail to properly restrict file access. An authorized local attacker can exploit this misconfiguration to escalate privileges, gaining access to sensitive application resources and system-level operations. The attack requires local access and an existing user account on the system.
Affected products
- Microsoft ASP.NET Core
Timeline
- 2026-10-29: disclosed