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TI-2021-01254 Aliases CVE-2021-1527GHSA-rq38-43xh-2f3p

Cisco Webex Player Memory Corruption Vulnerability

Priority LOW 28CWE-119Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

A vulnerability in Cisco Webex Player for Windows and MacOS could allow an attacker to cause the affected software to terminate or to gain access to memory state information that is related to the vulnerable application. The vulnerability is due to insufficient validation of values in Webex recording files that are stored in Webex Recording Format (WRF). An attacker could exploit this vulnerability by sending a malicious WRF file to a user as a link or email attachment and then persuading the user to open the file with the affected software on the local system. A successful exploit could allow the attacker to crash the affected software and view memory state information.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00576 47th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Webex Meetingsall versions—No fix listedCNA
  • Cisco Webex Meetings VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:cisco:webex_player:*:*:*:*:*:macos:*:*before 41.5VulnerableCisco
cpe:2.3:a:cisco:webex_player:*:*:*:*:*:windows:*:*before 41.5VulnerableCisco
  • cpe:2.3:a:cisco:webex_player:*:*:*:*:*:macos:*:* Versions before 41.5 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:webex_player:*:*:*:*:*:windows:*:* Versions before 41.5 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-1527
  2. 2026-10-03 Alias added: GHSA-rq38-43xh-2f3p

References

Advisory 1

  • TI-2021-01253 Cisco Webex Player Memory Corruption Vulnerability CVSS 3.1HIGH 7.8
  • TI-2021-01230 Cisco Webex Network Recording Player and Webex Player Memory Corruption Vulnerability CVSS 3.1HIGH 7.8
  • TI-2020-02877 Cisco Webex Network Recording Player and Cisco Webex Player Denial of Service Vulnerability CVSS 3.1LOW 3.3
  • TI-2020-02878 Cisco Webex Network Recording Player and Cisco Webex Player Denial of Service Vulnerability CVSS 3.1LOW 3.3
  • TI-2020-02875 Cisco Webex Network Recording Player and Cisco Webex Player Denial of Service Vulnerability CVSS 3.1LOW 3.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences