Information Disclosure in NET Core and Visual Studio (CVE-2021-34485)
Summary
Vulnerability in NET Core and Visual Studio (CVE-2021-34485). Confidential information can be exposed externally.
Original description
The description as published by the source.
.NET Core and Visual Studio Information Disclosure Vulnerability
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A weakness called CVE-2021-34485 was discovered in NET Core and Visual Studio.
In plain terms, it is an information exposure flaw.
Severity is Medium (CVSS 5/10). Exploitation requires specific conditions but can cause real harm if successful.
What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "NET Core and Visual Studio CVE-2021-34485".
CVE-2021-34485 (NET Core and Visual Studio). Severity: Medium / CVSSv3 5. Category: CWE-200.
Response plan:
- Check the vendor advisory for affected versions and the patched release.
- If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS).
- If no patch yet, mitigate via WAF rule, disabling the affected feature, etc.
- Monitor logs / SIEM for known IOC and PoC signatures of this CVE.
PoCs and fix commits: see the 'References' section, MITRE, and NVD.
A weakness (CVE-2021-34485) in NET Core and Visual Studio. In plain words, it is an information exposure flaw.
Target versions of NET Core and Visual Studio (see vendor advisory). If running in production, identify exposure immediately.
Severity: Medium (CVSS 5/10). Exploitation requires specific conditions but can cause real harm if successful.
Update to the patched release as listed in the vendor advisory. (Typical mitigation pattern for CWE-200)
If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.
Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.
Affected packages
References
- advisory portal.msrc.microsoft.com
- web msrc.microsoft.com
- web nvd.nist.gov