CVE-2025-36855 is a high-severity buffer over-read vulnerability (CWE-126) in DiaSymReader.dll, affecting End-of-Life (EOL) ASP.NET versions 6.0.0 through 6.0.36. This vulnerability, also present in ASP.NET 8.0.0-8.0.11 and 9.0.0 (CVE-2025-21176), can lead to high impact on confidentiality, integrity, and availability, with a CVSS score of 8.8. While no active exploits or public exploit code are known, and community discussion is minimal, self-contained applications targeting these EOL versions are also vulnerable and require recompilation. Microsoft will not provide updates for this EOL software.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| Microsoft | .NET 6.0 | >= 6.0.0, < 6.0.36CNA affected |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.
Remediation records are not available for this CVE.