Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2025-36855— EOL .NET 6.0 Runtime Remote Code Execution Vulnerability

Quick assessment

Affected
Microsoft .NET 6.0
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft .NET是美国微软（Microsoft）公司的一个致力于敏捷软件开发、快速应用开发、平台无关性和网络透明化的软件框架。 Microsoft .NET存在安全漏洞，该漏洞源于DiaSymReader.dll在处理符号数据时未校验长度，导致越界读取。

CVSS 8.8 · High EPSS 0.77% · P54

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2025-36855

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
EOL .NET 6.0 Runtime Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability ( CVE-2025-21176 https://www.cve.org/CVERecord ) exists in DiaSymReader.dll due to buffer over-read. Per CWE-126: Buffer Over-read https://cwe.mitre.org/data/definitions/126.html , Buffer Over-read is when a product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer. This issue affects EOL ASP.NET 6.0.0 <= 6.0.36 as represented in this CVE, as well as 8.0.0 <= 8.0.11 & <= 9.0.0 as represented in CVE-2025-21176. Additionally, if you've deployed self-contained applications https://docs.microsoft.com/dotnet/core/deploying/#self-contained-deployments-scd  targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed. 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区上溢读取
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft .NET 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft .NET是美国微软（Microsoft）公司的一个致力于敏捷软件开发、快速应用开发、平台无关性和网络透明化的软件框架。 Microsoft .NET存在安全漏洞，该漏洞源于DiaSymReader.dll在处理符号数据时未校验长度，导致越界读取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft .NET 6.0 6.0.0 ~ 6.0.36 -

II. Public POCs for CVE-2025-36855

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2025-36855

请登录查看更多情报信息。

Vendor Advisories for CVE-2025-36855 (1)

Other References for CVE-2025-36855 (1)

Same Patch Batch · Microsoft · 2025-09-08 · 5 CVEs total

CVE-2025-36854 8.1 HIGH EOL ASP.NET 6.0 Remote Code Execution Vulnerability
CVE-2025-36853 7.5 HIGH EOL .NET 6.0 Runtime Remote Code Execution Vulnerability
CVE-2022-50238 7.4 HIGH Microsoft Windows Defender Application Control 安全漏洞
CVE-2025-59033 7.4 HIGH Microsoft Windows Defender Application Control 安全漏洞

IV. Related Vulnerabilities

Same product: .NET 6.0
Same vendor: Microsoft
Same weakness: CWE-126

V. Comments for CVE-2025-36855

No comments yet

Leave a comment