CVE-2020-3321

Application crash via malformed recording elements

Published Jun 3, 2020 · Updated Nov 15, 2024

Improper input validation in Cisco Webex recording players allows attackers to crash the application with a crafted ARF or WRF file. The players insufficiently validate unspecified recording elements while loading untrusted Advanced Recording Format or Webex Recording Format files. Exploitation requires a user to open the delivered file on Windows, and the resulting denial of service is limited to the player process.

CVSS severity3.3
Low
EPSS probability1.40%
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 recording players allows attackers to crash the application with a crafted ARF or WRF file. The players insufficiently validate unspecified recording elements while loading untrusted Advanced Recording Format or Webex Recording Format files. Exploitation requires a user to open the delivered file on Windows, and the resulting denial of service is limited to the player process.

The record

CVE
CVE-2020-3321
Published
Jun 3, 2020
Updated
Nov 15, 2024
Vendor
Cisco
Product
Cisco Webex Network Recording Player
Classifications
CWE-20, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 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=unspecified <3.0 MR3 Security Patch 2
  2. Affected versionversion=unspecified <4.0 MR3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Cisco · Cisco Webex Network Recording Playerversion=unspecified <3.0 MR3 Security Patch 2; version=unspecified <4.0 MR3
Cisco · Cisco Webex Playerversion=unspecified <3.0 MR3 Security Patch 2; version=unspecified <4.0 MR3

Published CVSS scores

3.3Cisco Systems, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1204.002User Execution: Malicious File

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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