Is CVE-2026-40572 actively exploited?

No active exploitation of CVE-2026-40572 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40572 be exploited remotely?

No. CVE-2026-40572 requires local access to exploit.

What is the CVSS score of CVE-2026-40572?

CVE-2026-40572 has a CVSS score of 9.0 (CRITICAL).

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CRITICAL

CVE-2026-40572

CWE-269Published: April 18, 2026· Updated: Apr 20, 2026

9.0

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.8th

Official Description

NovumOS is a custom 32-bit operating system written in Zig and x86 Assembly. In versions prior to 0.24, Syscall 15 (MemoryMapRange) allows Ring 3 user-mode processes to map arbitrary virtual address ranges into their address space without validating against forbidden regions, including critical kernel structures such as the IDT, GDT, TSS, and page tables. A local attacker can exploit this to modify kernel interrupt handlers, resulting in privilege escalation from user mode to kernel context. This issue has been fixed in version 0.24.

NVD Source

Technical Analysis

CVE-2026-40572 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.0.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.