CVE-2025-20236Network attack vector

Command execution via crafted meeting invite links

Published Apr 16, 2025 · Updated Feb 26, 2026

Improper input validation in Cisco Webex App 44.6 through 44.7 allows remote attackers to execute commands via crafted meeting invite links. The custom URL parser accepts a crafted invite link that directs the app to download arbitrary files without sufficient validation. Exploitation requires a targeted user to click the link and download the file; resulting commands run with that user's privileges.

CVSS severity8.8
High
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Cisco Webex App 44.6 through 44.7 allows remote attackers to execute commands via crafted meeting invite links. The custom URL parser accepts a crafted invite link that directs the app to download arbitrary files without sufficient validation. Exploitation requires a targeted user to click the link and download the file; resulting commands run with that user's privileges.

The record

CVE
CVE-2025-20236
Published
Apr 16, 2025
Updated
Feb 26, 2026
Vendor
ClamAV
Product
Webex App
Classifications
CWE-829, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record 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=44.6
  2. Affected versionversion=44.6.0.29928
  3. Affected versionversion=44.6.0.30148
  4. Affected versionversion=44.7
  5. Affected versionversion=44.7.0.30141
  6. Affected versionversion=44.7.0.30285

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Webex Appversion=44.6; version=44.6.0.29928; version=44.6.0.30148; version=44.7; version=44.7.0.30141; version=44.7.0.30285

Published CVSS scores

8.8CiscoCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-829Inclusion of Functionality from Untrusted Control Sphere
T1204.001User Execution Malicious Link

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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