Cisco Webex Meetings Desktop App Update Service Command Injection Vulnerability

published 2018-10-24 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-7320

cvss: 7.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 16.0%; EPSS 16.0% chance of exploitation in 30 days, percentile 96%
public exploits: 5; Metasploit, Exploit-DB

A vulnerability in the update service of Cisco Webex Meetings Desktop App for Windows could allow an authenticated, local attacker to execute arbitrary commands as a privileged user. The vulnerability is due to insufficient validation of user-supplied parameters. An attacker could exploit this vulnerability by invoking the update service command with a crafted argument. An exploit could allow the attacker to run arbitrary commands with SYSTEM user privileges. While the CVSS Attack Vector metric denotes the requirement for an attacker to have local access, administrators should be aware that in Active Directory deployments, the vulnerability could be exploited remotely by leveraging the operating system remote management tools.

Patch / fix

fixed in 2

cisco webex_meetings_desktop 33.6.4
cisco webex_productivity_tools 33.0.6

Timeline

2018-10-09 First public exploit (Metasploit exploit/windows/local/webexec)
2018-10-24 Published

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 23 mo ago (2024-11-25)

Exploit prediction

16.02% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Metasploit exploit/windows/smb/webexec WebExec Authenticated User Code Execution metasploit exploit, manual rank, 2018-10-24
Metasploit exploit/windows/local/webexec WebEx Local Service Permissions Exploit metasploit exploit, good rank, 2018-10-09
Metasploit auxiliary/admin/smb/webexec_command WebEx Remote Command Execution Utility metasploit auxiliary, normal rank
EDB-45696 WebEx - Local Service Permissions Exploit (Metasploit) local, 2018-10-25
EDB-45695 WebExec - (Authenticated) User Code Execution (Metasploit) remote, 2018-10-25

CVSS scores

assigned by	version	score	vector
CNA	3.0	7.8	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	3.0	7.8	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.2	AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

Cisco Cisco WebEx Event Center

Classification

Weakness

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

References

exploit-db.com /exploits/45696/
exploit, third-party-advisory, vdb-entry
exploit-db.com /exploits/45695/
exploit, third-party-advisory, vdb-entry
tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-20181024-webex-injection
vendor-advisory
securityfocus.com /bid/105734
vdb-entry, third-party-advisory
securitytracker.com /id/1041942
vdb-entry, third-party-advisory

Sources

CVE List CVE-2018-15442
NVD CVE-2018-15442

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.

Summary