CVE-2021-42976
NoMachine Enterprise Desktop is affected by Buffer Overflow. IOCTL Handler 0x22001B in the...
NoMachine Enterprise Desktop is affected by Buffer Overflow. IOCTL Handler 0x22001B in the NoMachine Enterprise Desktop 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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
NoMachine Enterprise Desktop is affected by Buffer Overflow. IOCTL Handler 0x22001B in the NoMachine Enterprise Desktop 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.
- Record
CVE-2021-42976- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - CVSS 2.0
- 7.2 High
AV:L/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-120
- Updated
- 2026-11-02
CVE List No score
NoMachine Enterprise Desktop is affected by Buffer Overflow. IOCTL Handler 0x22001B in the NoMachine Enterprise Desktop 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.
- Record
CVE-2021-42976- Updated
- 2026-11-02
EUVDEUVD-2021-29931 No score
NoMachine Enterprise Desktop is affected by Buffer Overflow. IOCTL Handler 0x22001B in the NoMachine Enterprise Desktop 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.
- Record
EUVD-2021-29931- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3724-4mmc-j59x No score
NoMachine Enterprise Desktop is affected by Buffer Overflow. IOCTL Handler 0x22001B in the...
NoMachine Enterprise Desktop is affected by Buffer Overflow. IOCTL Handler 0x22001B in the NoMachine Enterprise Desktop 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.
- Record
GHSA-3724-4mmc-j59x- Weakness
- CWE-120
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-42976 is a high vulnerability (CVSS 8.8) in Nomachine Enterprise Desktop, published December 7, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.48%, the 41st percentile. No source names a fixed version.