CVE-2020-3347

Local information disclosure via unsafe shared memory

Published Jun 18, 2020 · Updated Nov 15, 2024

Information disclosure in Cisco Webex Meetings Desktop App for Windows before 41.2 allows local users to read sensitive shared memory. The client exchanges data through Windows shared memory but leaves usernames, meeting details, and authentication tokens readable by other local processes. Exploitation requires permission to inspect system memory and exposes data that can support later attacks without altering meetings or system state.

CVSS severity5.5
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Cisco Webex Meetings Desktop App for Windows before 41.2 allows local users to read sensitive shared memory. The client exchanges data through Windows shared memory but leaves usernames, meeting details, and authentication tokens readable by other local processes. Exploitation requires permission to inspect system memory and exposes data that can support later attacks without altering meetings or system state.

The record

CVE
CVE-2020-3347
Published
Jun 18, 2020
Updated
Nov 15, 2024
Vendor
Cisco
Product
Cisco WebEx Meetings Server
Classifications
CWE-200, T1005
Attack vector
local
Privileges
authenticated

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 vectorlocal
Required privilegesauthenticated

What is affected?

Cisco · Cisco WebEx Meetings Serverversion=n/a

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
5.5Cisco Systems, Inc.CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:X/RL:X/RC:X
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1005Data from Local System

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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