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Fencer Vulns
high 7.8

CVE-2018-17980 json

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 d…

published 2018-10-15 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-9720

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.6%
EPSS 4.6% chance of exploitation in 30 days, percentile 91%
public exploits
1
Exploit-DB

Summary

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.).

Patch / fix

  • nomachine nomachine 5.3.27, 6.3.6

Timeline

  1. First public exploit (EDB-45611)
  2. Published

Exploit prediction

4.55% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-45611 NoMachine < 5.3.27 - Remote Code Execution remote, 2018-10-15
  • packetstormsecurity.com http://packetstormsecurity.com/files/149784/NoMachine-5.3.26-Remote-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified
  • hyp3rlinx.altervista.org http://hyp3rlinx.altervista.org/advisories/NOMACHINE-TROJAN-FILE-REMOTE-CODE-EXECUTION.txt referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.