.NET Windows Desktop Runtime Local Elevation of Privilege
CVE-2026-35433 is a local elevation-of-privilege vulnerability in .NET affecting Windows Desktop runtime packages on Windows, including .NET 8.0, 9.0, and 10.0. The provided content attributes the flaw to improper input validation, with integer overflow or wraparound also referenced as an associated weakness. One description also characterizes the issue as a heap-based buffer overflow. Successful exploitation requires a user to trigger the payload in the vulnerable application, after which attacker-controlled code executes within the compromised process space. The resulting privileges are those of the victim process; if that process is running elevated, as a service, or under an administrative context, exploitation can yield Administrator or NT AUTHORITY\SYSTEM-level execution.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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.
Recent activity
6 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.
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.
The version that knows your environment.
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.