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CVE-2026-35433 is a local elevation-of-privilege vulnerability in the .NET runtime on Windows affecting .NET 8.0, 9.0, and 10.0 prior to the patched releases. The flaw is described as improper input validation and is also associated with an integer overflow or wraparound condition. Publicly available advisory material does not identify the exact vulnerable runtime subcomponent or function. Successful exploitation requires local access and user interaction to trigger the payload in an affected application, after which an attacker can execute within the context of the vulnerable process and potentially escalate privileges to SYSTEM on affected Windows systems.
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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.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability that enables arbitrary code execution within the context of the affected application process, with impact ranging from local code execution as the current user to full Administrator or NT AUTHORITY\SYSTEM compromise if the vulnerable application runs elevated.
A local elevation of privilege vulnerability in the .NET runtime caused by improper input validation combined with an integer overflow condition, potentially allowing an attacker to gain SYSTEM privileges on affected Windows systems.
An elevation of privilege vulnerability affecting supported .NET versions, fixed in the May 2026 servicing updates.
An important .NET elevation of privilege vulnerability caused by improper input validation and integer overflow/wraparound issues, allowing a local unauthorized attacker to gain elevated privileges, potentially up to SYSTEM, with user interaction required.
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.