CVE-2018-17980

Severity: high (CVSS 7.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-10-15 · updated 2026-06-17
Weakness: CWE-426

Description

NoMachine before 5.3.27 and 6.x before 6.3.6 allows attackers to gain privileges via a Trojan horse wintab32.dll file located in the same directory as a .nxs file, as demonstrated by a scenario where the .nxs file and the DLL are in the current working directory, and the Trojan horse code is executed. (The directory could, in general, be on a local filesystem or a network share.).

Affected products

NoMachine: before 5.3.27; from 6.0.0 before 6.3.6 — fixed in 5.3.27, 6.3.6

How to fix

Upgrade to a fixed version: NoMachine 5.3.27, 6.3.6. Check the vendor advisory for mitigations.

References

http://hyp3rlinx.altervista.org/advisories/NOMACHINE-TROJAN-FILE-REMOTE-CODE-EXECUTION.txt
http://packetstormsecurity.com/files/149784/NoMachine-5.3.26-Remote-Code-Execution.html
https://www.exploit-db.com/exploits/45611/
https://www.nomachine.com/TR10P08887
http://hyp3rlinx.altervista.org/advisories/NOMACHINE-TROJAN-FILE-REMOTE-CODE-EXECUTION.txt
http://packetstormsecurity.com/files/149784/NoMachine-5.3.26-Remote-Code-Execution.html
https://www.exploit-db.com/exploits/45611/
https://www.nomachine.com/TR10P08887

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