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Fencer Vulns
critical 9.8

CVE-2019-16662 in the critical feed json

An issue was discovered in rConfig 3.9.2.

published 2019-10-28 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-7227

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
97.7%
EPSS 97.7% chance of exploitation in 30 days, percentile 99.9%
public exploits
3
Metasploit, Exploit-DB, plus a Nuclei check

Summary

An issue was discovered in rConfig 3.9.2. An attacker can directly execute system commands by sending a GET request to ajaxServerSettingsChk.php because the rootUname parameter is passed to the exec function without filtering, which can lead to command execution.

Timeline

  1. First public exploit (Metasploit exploit/unix/webapp/rconfig_install_cmd_exec)
  2. Published

Exploit prediction

97.70% chance of exploitation in the next 30 days, higher than 99.9% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Metasploit exploit/unix/webapp/rconfig_install_cmd_exec rConfig install Command Execution metasploit exploit, excellent rank, 2019-10-28
  • EDB-47602 rConfig - install Command Execution (Metasploit) remote, 2019-11-08
  • EDB-47555 rConfig 3.9.2 - Remote Code Execution webapps, 2019-10-29
  • Nuclei template rConfig 3.9.2 - Remote Code Execution nuclei detection template
  • gist.github.com https://gist.github.com/mhaskar/ceb65fa4ca57c3cdccc1edfe2390902e referenced PoC, tagged "exploit" by a source, unverified
  • drive.google.com https://drive.google.com/open?id=1OXI5cNuwWqc6y-7BgNCfYHgFPK2cpvnu referenced PoC, tagged "exploit" by a source, unverified
  • drive.google.com https://drive.google.com/file/d/1bTpTn4-alJ8qGCEATLq-oVM6HbhE65iY/view?usp=sharing referenced PoC, tagged "exploit" by a source, unverified
  • shells.systems https://shells.systems/rconfig-v3-9-2-authenticated-and-unauthenticated-rce-cve-2019-16663-and-cve-2019-16662/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

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.