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A critical remote code execution vulnerability in Microsoft .NET and Visual Studio arises from improper evaluation of data types. The flaw can be triggered in two documented attack paths: by sending specially crafted requests to a vulnerable .NET web application, or by causing a vulnerable desktop application in the Visual Studio/.NET ecosystem to load a specially crafted file. Available reporting indicates the issue is exploitable by a remote, unauthenticated attacker and has a CVSS score of 9.8. The vulnerable condition is described as incorrect handling or interpretation of data types during processing, which can lead to unintended execution of attacker-controlled code.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Critical remote code execution vulnerability in .NET and Visual Studio caused by improper type handling/evaluation.
A critical .NET/Visual Studio vulnerability enabling remote code execution via malicious web requests to vulnerable .NET web applications or via specially crafted files loaded into vulnerable desktop applications.
.NET and Visual Studio remote code execution vulnerability.
A critical remote code execution vulnerability in .NET and Visual Studio, exploitable via crafted packets or files.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.