Cisco Unity Express CVE-2019-15986 Local Command Injection Vulnerability



Date Discovered

November 20, 2019


Cisco Unity Express is prone to a local command-injection vulnerability. A local attacker can exploit this issue to execute arbitrary commands on the underlying OS with root privileges. This issue is being tracked by Cisco Bug ID CSCvq54120. Versions prior to Cisco Unity Express 10.1 are vulnerable.

Technologies Affected

  • Cisco Unity Express 1.1(1)
  • Cisco Unity Express 10
  • Cisco Unity Express 2.1(1)
  • Cisco Unity Express 2.2(2)
  • Cisco Unity Express 2.3(1)
  • Cisco Unity Express 4.0
  • Cisco Unity Express 4.2
  • Cisco Unity Express 7.0
  • Cisco Unity Express 7.0.1
  • Cisco Unity Express 8.0
  • Cisco Unity Express 9.0(3)
  • Cisco Unity Express 9.0.0
  • Cisco Unity Express 9.0.6


Permit local access for trusted individuals only. Where possible, use restricted environments and restricted shells.
Restrict local access to trusted and accountable individuals only.

Run all software as a nonprivileged user with minimal access rights.
To limit the impact of latent vulnerabilities, configure servers and other applications to run as a nonadministrative user with minimal access rights.

Updates are available. Please see the references or vendor advisory for more information.



Sreekanth Narayanan of Cisco

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