CVE & CISA-KEV Catalog

CVE-2021-1372

MEDIUM
5.5
CVSS v3
NVD

Description

A vulnerability in Cisco Webex Meetings Desktop App and Webex Productivity Tools for Windows could allow an authenticated, local attacker to gain access to sensitive information on an affected system. This vulnerability is due to the unsafe usage of shared memory by the affected software. An attacker with permissions to view system memory could exploit this vulnerability by running an application on the local system that is designed to read shared memory. A successful exploit could allow the attacker to retrieve sensitive information from the shared memory, including usernames, meeting information, or authentication tokens. Note: To exploit this vulnerability, an attacker must have valid credentials on a Microsoft Windows end-user system and must log in after another user has already authenticated with Webex on the same end-user system.

How to fix

Remediation Available
Cisco Webex MeetingsWindows application
Affected:40.6Fixed in:40.6Cisco Webex LLC
Affected:40.10Fixed in:40.10Cisco Webex LLC
WebexWindows application
Affected:40.10Fixed in:40.10Cisco Systems, Inc
Affected:40.6Fixed in:40.6Cisco Systems, Inc
Affected:40.10Fixed in:40.10Cisco Systems, Inc
Affected:40.6Fixed in:40.6Cisco Systems, Inc

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityNone
AvailabilityNone

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.41%probability of exploitation in 30 days
34thpercentile

Low risk: more likely to be exploited than 34% of all known CVEs.

References

Vendor Advisory1

Related Vulnerabilities

Other CWE-202 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2025-25205High8.24.2%-Fix
CVE-2025-69200High7.52.0%-Fix
CVE-2021-32743High8.81.8%-Fix
CVE-2019-19000Medium6.51.1%--
CVE-2022-20747Medium6.50.9%-Fix
CVE-2023-0785Low3.70.9%--

Common questions

How do I fix CVE-2021-1372?

Published advisories record a fix for 2 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2021-1372 being actively exploited?

Not that we know of. CVE-2021-1372 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.41% is the estimated probability that it will be exploited in the next 30 days. That is higher than 34% of all scored CVEs.

How severe is CVE-2021-1372?

CVE-2021-1372 has a CVSS v3 base score of 5.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2021-1372 affect?

Published advisories record a fix for Cisco Webex Meetings (Windows application), Webex (Windows application). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.