CVE-2020-3263Network attack vector

Arbitrary code execution via malicious application URL

Published Jun 18, 2020 · Updated Nov 15, 2024

Improper URL input validation in Cisco Webex Meetings Desktop App before 39.5.12 allows remote attackers to execute local programs. Application-URL processing launches programs referenced by attacker-controlled URL input without adequately validating the supplied path. A user must follow the malicious URL; arbitrary code execution additionally requires a malicious file already planted locally or on an accessible network path.

CVSS severity7.5
High
EPSS probability4.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper URL input validation in Cisco Webex Meetings Desktop App before 39.5.12 allows remote attackers to execute local programs. Application-URL processing launches programs referenced by attacker-controlled URL input without adequately validating the supplied path. A user must follow the malicious URL; arbitrary code execution additionally requires a malicious file already planted locally or on an accessible network path.

The record

CVE
CVE-2020-3263
Published
Jun 18, 2020
Updated
Nov 15, 2024
Vendor
Cisco
Product
Cisco WebEx Meetings Server
Classifications
CWE-20, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 18, 2020CVE publishedPublication date reported by the CVE source.
  2. Nov 15, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cisco · Cisco WebEx Meetings Serverversion=n/a

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
7.5Cisco Systems, Inc.CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
7.6NVDAV:N/AC:H/Au:N/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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