CVE-2021-42986 is an integer overflow vulnerability in the NoMachine Enterprise Client (versions above 4.0.346 and below 7.7.4). This flaw allows a local attacker to execute arbitrary code in kernel mode or cause a denial of service through memory corruption and an OS crash by sending a specially crafted I/O Request Packet to IOCTL Handler 0x22001B. With a CVSS score of 8.8 (High), it presents a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. While not currently listed in CISA's KEV catalog and lacking public exploit code in Metasploit or ExploitDB, it has garnered some community discussion and media coverage, indicating awareness within the security community.
| 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.