TI-2021-19063 Aliases CVE-2021-42979 GHSA-27vq-c7q6-wxpx

NoMachine Cloud Server is affected by Integer Overflow.

LOW 39CWE-190Published 2021-12-07 · Updated 2024-08-04

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.

Summary

NoMachine Cloud Server is affected by Integer Overflow. IOCTL Handler 0x22001B in the NoMachine Cloud 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.

Why it matters now

EPSS 0.00497 42nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:nomachine:cloud_server::::::::	after 4.0.346, before 7.7.4	Vulnerable	NoMachine

cpe:2.3:a:nomachine:cloud_server:*:*:*:*:*:*:*:* Versions after 4.0.346, before 7.7.4 Vulnerable ·NoMachine

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-42979
2026-10-03 Alias added: GHSA-27vq-c7q6-wxpx

References

Exploit 1

https://www.sentinelone.com/labs/usb-over-ethernet-multiple-privilege-escalation-vulnerabilities-in-aws-and-other-major-cloud-services/

TI-2021-19064 NoMachine Cloud Server is affected by Buffer Overflow. CVSS 3.1HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences