CVE-2020-3263

Cisco Webex Meetings Desktop App URL Filtering Arbitrary Program Execution Vulnerability

HIGH
7.5
CVSS Score
Published: June 18, 2020 at 02:21 AM UTC
Updated: June 17, 2026 at 03:17 AM UTC
2 products affected across 1 vendorWebex MeetingsWebex Meetings Server

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Severity
HIGH7.5
Exploit prediction
EPSS 4%
SSVC
No known exploit

Description

A vulnerability in Cisco Webex Meetings Desktop App could allow an unauthenticated, remote attacker to execute programs on an affected end-user system. The vulnerability is due to improper validation of input that is supplied to application URLs. The attacker could exploit this vulnerability by persuading a user to follow a malicious URL. A successful exploit could allow the attacker to cause the application to execute other programs that are already present on the end-user system. If malicious files are planted on the system or on an accessible network file path, the attacker could execute arbitrary code on the affected system.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 39.5.12
Affected range stops below 39.5.12, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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