CVE-2021-1410Network attack vector

Cross-account list modification via missing ownership check

Published Nov 18, 2024 · Updated Nov 18, 2024

Improper access control in Cisco Webex Meetings before 41.2.0 allows remote authenticated users to modify others' distribution lists. The distribution-list update interface accepts a crafted request without verifying that the authenticated requester owns the targeted list. Any organization member with an account can alter another member's list contents, while confidentiality and service availability remain unaffected.

CVSS severity4.3
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Cisco Webex Meetings before 41.2.0 allows remote authenticated users to modify others' distribution lists. The distribution-list update interface accepts a crafted request without verifying that the authenticated requester owns the targeted list. Any organization member with an account can alter another member's list contents, while confidentiality and service availability remain unaffected.

The record

CVE
CVE-2021-1410
Published
Nov 18, 2024
Updated
Nov 18, 2024
Vendor
ClamAV
Product
Webex Meetings
Classifications
CWE-284
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 18, 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=39.10
  2. Affected versionversion=39.11
  3. Affected versionversion=39.6
  4. Affected versionversion=39.7
  5. Affected versionversion=39.7.4
  6. Affected versionversion=39.7.7
  7. Affected versionversion=39.8
  8. Affected versionversion=39.8.2
  9. Affected versionversion=39.8.3
  10. Affected versionversion=39.8.4
  11. Affected versionversion=39.9
  12. Affected versionversion=39.9.1
  13. Affected versionversion=40.1
  14. Affected versionversion=40.2
  15. Affected versionversion=40.4
  16. Affected versionversion=40.4.10
  17. Affected versionversion=40.6
  18. Affected versionversion=40.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Webex Meetingsversion=39.10; version=39.11; version=39.6; version=39.7; version=39.7.4; version=39.7.7; version=39.8; version=39.8.2; version=39.8.3; version=39.8.4; version=39.9; version=39.9.1; version=40.1; version=40.2; version=40.4; version=40.4.10; version=40.6; version=40.6.2

Published CVSS scores

4.3Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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