TI-2021-13716 Aliases CVE-2021-34716 GHSA-9mxr-mcvr-5xpm

Cisco Expressway Series and TelePresence Video Communication Server Remote Code Execution Vulnerability

LOW 38CWE-460Published 2021-08-18 · Updated 2024-11-07

Key facts

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

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

Summary

A vulnerability in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker to execute arbitrary code on the underlying operating system as the root user. This vulnerability is due to incorrect handling of certain crafted software images that are uploaded to the affected device. An attacker could exploit this vulnerability by authenticating to the system as an administrative user and then uploading specific crafted software images to the affected device. A successful exploit could allow the attacker to execute arbitrary code on the underlying operating system as the root user.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.02395 84th 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: Total

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco TelePresence Video Communication Server (VCS) Expressway	all versions	—	No fix listed	CNA

Cisco TelePresence Video Communication Server (VCS) Expressway VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:expressway::::::::	x8.6.0 to before x14.1	Vulnerable	Cisco
cpe:2.3:a:cisco:telepresence_video_communication_server::::::::	x8.6 – x14.0.3	Vulnerable	Cisco

cpe:2.3:a:cisco:expressway:*:*:*:*:*:*:*:* Versions x8.6.0 to before x14.1 Vulnerable ·Cisco
cpe:2.3:a:cisco:telepresence_video_communication_server:*:*:*:*:*:*:*:* Versions x8.6 – x14.0.3 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-34716
2026-10-03 Alias added: GHSA-9mxr-mcvr-5xpm

References

Patch 1

20210818 Cisco Expressway Series and TelePresence Video Communication Server Remote Code Execution Vulnerability

TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
TI-2018-03923 Uncontrolled resource consumption in Linux Kernel CVSS 3.1HIGH 7.5
TI-2022-05371 Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities CVSS 3.1CRITICAL 9.0
TI-2024-13189 Cross-site request forgery in Cisco TelePresence Video Communication Server Expressway CVSS 3.1CRITICAL 9.6
TI-2024-13187 Cross-site request forgery in Cisco TelePresence Video Communication Server Expressway CVSS 3.1CRITICAL 9.6
TI-2022-05372 Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities CVSS 3.1CRITICAL 9.0

See all 13 →

Sources

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