Windows Kernel Elevation of Privilege Vulnerability
CVE-2026-33841 is a Windows Kernel elevation of privilege vulnerability caused by a heap-based buffer overflow. Microsoft describes the flaw as a heap-based buffer overflow in the Windows Kernel that can be exploited by an authorized local attacker. Successful exploitation can cross a privilege boundary from a contained or sandboxed low-integrity execution context, including AppContainer-related scenarios, and elevate the attacker’s privileges on the affected system. Microsoft rated the issue Important and assigned CVSS v3.1 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Are you exposed to this one?
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
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
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Windows Kernel elevation of privilege vulnerability assessed as more likely to be exploited, allowing a local attacker to elevate privileges to SYSTEM or higher integrity levels.
An important Windows Kernel elevation of privilege vulnerability that Microsoft determined is more likely to be exploited.
A Windows Kernel heap-based buffer overflow elevation of privilege vulnerability that allows a locally authorized attacker to elevate privileges.
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.