CVE-2021-42973

PoC —

CVSS 3.1

8.8 high

EPSS

<1%p40

Published

Dec 7, 2021 (Dec 7, 2021)

Modified

Jun 17, 2026

Description

NoMachine Server is affected by Integer Overflow. IOCTL Handler 0x22001B in the NoMachine Server above 4.0.346 and below 7.7.4 allow local attackers to execute arbitrary code in kernel mode or cause a denial of service (memory corruption and OS crash) via specially crafted I/O Request Packet.

Vendors: nomachine
Products: server
Weakness: CWE-190
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.5%)

In the news0 stories

No ingested article mentions this CVE yet.