CVE-2021-34532
MediumCVSS 5.5Exploitation Probability (EPSS)
Elevated risk63th percentile - higher than 63% of all known CVEs
Summary
Information disclosure vulnerability in ASP.NET Core and Visual Studio. Could allow an attacker to read sensitive data.
Risk Assessment
Risk of exposing sensitive information in web applications and development environment.
Recommendation
Update ASP.NET Core and Visual Studio to the latest versions with security fixes.
Other vulnerabilities in ASP.NET Core
See all- CVE-2017-11879High
ASP.NET Core 2.0 allows an attacker to steal log-in session information such as cookies or authentication tokens via a specially crafted URL.
- CVE-2017-0249High
An elevation of privilege vulnerability exists when ASP.NET Core fails to properly sanitize web requests.
- CVE-2026-40372Critical
A vulnerability in ASP.NET Core due to improper verification of cryptographic signature allows an unauthorized attacker to elevate privileges over a network.
- CVE-2020-1161High
Denial of service vulnerability in ASP.NET Core when improperly handling web requests. A remote unauthenticated attacker could send specially crafted requests, causing the application to become unavailable.
- CVE-2026-69304Medium
Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
- CVE-2026-57099High
Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.
- CVE-2026-47303High
ASP.NET Core has an authentication bypass vulnerability due to assumed-immutable data. This allows an authorized attacker to elevate privileges over a network.
- CVE-2026-47300High
Incorrect implementation of authentication algorithm in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
- CVE-2026-56170High
Resource allocation without limits in ASP.NET Core allows an unauthorized attacker to perform a DoS attack over the network.
- CVE-2026-50506High
Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Original NVD description (English source)
ASP.NET Core and Visual Studio Information Disclosure Vulnerability
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

