CVE-2021-42983 is a high-severity buffer overflow vulnerability (CWE-120) affecting NoMachine Enterprise Client versions above 4.0.346 and below 7.7.4. A local attacker can exploit an IOCTL handler (0x22001B) via a specially crafted I/O Request Packet to achieve arbitrary code execution in kernel mode or cause a denial of service. With a CVSS score of 8.8, this vulnerability has low attack complexity and requires local privileges, but can lead to complete compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code, or inclusion in the KEV catalog, though it has received some media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
> 4.0.346, < 7.7.4CPE matchmatch criteria | cpe:2.3:a:nomachine:enterprise_client:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.